Odor-adsorbing molded article resin composition, odor-adsorbing molded article, and packaging material

ABSTRACT

An object of the present invention is to provide a resin composition for an odor-adsorbing molded article that is excellent in manufacturability, eliminates odor by exerting a high adsorbing effect on odorous organic matter originally contained in packaging materials and odor generated by the decomposition, etc. of resins constituting packages during disinfection/sterilization treatment such as UV irradiation, hot packing, boiling, γ ray irradiation, or EB irradiation, is less likely to desorb the odor once adsorbed and capable of efficiently adsorbing odor and therefore exerts a high adsorbing effect over a long period without reducing the ability to adsorb odor, and is excellent in resistance to change in taste and odor of contents, and an odor-adsorbing molded article prepared from the resin composition for an odor-adsorbing molded article. The present invention provides a resin composition for an odor-adsorbing molded article comprising at least thermoplastic resin A and an odor adsorbent material, wherein the odor adsorbent material comprises hydrophobic zeolite having a SiO2/Al2O3 molar ratio of 30/1 to 8000/1, and a melt flow rate of the thermoplastic resin A is 5 g/min or more and 100 g/min or less, and an odor-adsorbing molded article prepared from the resin composition for an odor-adsorbing molded article.

TECHNICAL FIELD

The present invention relates to a resin composition for anodor-adsorbing molded article excellent in resistance to change in tasteand odor which prevents odorous organic matter originally contained inpackaging materials and odor components generated by packaging materialsduring disinfection/sterilization treatment from moving to liquidcontents in packages and offering strange taste or strange odor to thecontents, and an odor-adsorbing molded article prepared from the resincomposition.

The present invention also relates to a sealant film excellent inpinhole resistance and excellent in resistance to change in taste andodor which prevents elutable organic matter originally contained inpackaging materials and odor components generated by sealant filmsduring disinfection/sterilization treatment from moving to liquidcontents in packages and offering strange taste or strange odor to thecontents, and a packaging material and a package, particularly, a liquidcontent package for BIB (bag in box), prepared from the odor-adsorbingsealant film.

The present invention also relates to an odor-adsorbing laminateexcellent in resistance to change in taste and odor which preventselutable organic matter originally contained in packaging materials andodor components generated by packaging materials duringdisinfection/sterilization treatment from moving to liquid contents inpackages and offering strange taste or strange odor to the contents, andan odor-adsorbing film for a packaging material, an odor-adsorbingpackaging material, an odor-adsorbing packaging material for BIB, and anodor-adsorbing liquid content packaging material for BIB prepared fromthe odor-adsorbing laminate.

The present invention also relates to a package excellent in pinholeresistance and excellent in resistance to change in taste and odor whichprevents elutable organic matter originally contained in packagingmaterials and odor components generated by packaging materials duringdisinfection/sterilization treatment from moving to liquid contents inpackages and offering strange taste or strange odor to the contents, aliquid content package for BIB (bag in box) comprising the package, anda packaging material constituting the package.

The present invention also relates to a package having a double-bagportion, excellent in pinhole resistance and excellent in resistance tochange in taste and odor which prevents elutable organic matteroriginally contained in packaging materials and odor componentsgenerated by packaging materials during disinfection/sterilizationtreatment from moving to liquid contents in packages and offeringstrange taste or strange odor to the contents, a liquid content packagefor BIB (bag in box) comprising the package, and a packaging materialconstituting the package.

BACKGROUND ART

Packaging materials including an odor adsorbent which adsorbs odor havebeen proposed as packaging materials (Patent Literature 1). In suchpackaging materials, an odor adsorbent such as synthetic zeolite oractivated carbon is kneaded into a resin material.

However, unfortunately, such packaging materials adsorb not only odorbut moisture in the atmosphere and desorb the odor once adsorbed.Therefore, no sufficient odor-adsorbing effect is obtained.

Packaging materials containing an odor adsorbent in which a chemicaladsorbent is supported on an inorganic porous material are also known(Patent Literature 2). Such packaging materials merely adsorb odorcomponents having a specific functional group as main matter to beadsorbed, and cannot reduce the amount of generated organic matterhaving no functional group unless a resin material is selected. Thus,odor components cannot be sufficiently adsorbed.

CITATION LIST Patent Literature Patent Literature 1: Japanese Patent No.2538487 Patent Literature 2: Japanese Patent Laid-Open No. 2014-233408SUMMARY OF INVENTION Technical Problem

In order to solve the problems mentioned above, an object of the presentinvention is to provide a resin composition for an odor-adsorbing moldedarticle that is excellent in manufacturability, eliminates odor byexerting a high adsorbing effect on odorous organic matter originallycontained in packaging materials and odor generated by thedecomposition, etc. of resins constituting packages duringdisinfection/sterilization treatment such as UV irradiation, hotpacking, boiling, γ ray irradiation, or EB irradiation, is less likelyto desorb the odor once adsorbed and capable of efficiently adsorbingodor and therefore exerts a high adsorbing effect over a long periodwithout reducing the ability to adsorb odor, and is excellent inresistance to change in taste and odor of contents, and anodor-adsorbing molded article prepared from the resin composition for anodor-adsorbing molded article (object 1).

A further object of the present invention is to provide a packagingmaterial excellent in pinhole resistance against friction, etc. duringtransport and excellent in resistance to leakage of liquid contents, anda liquid content package for BIB comprising the packaging material(object 2).

A further object of the present invention is to provide anodor-adsorbing laminate excellent in resistance to change in taste andodor of liquid contents, and an odor-adsorbing film for packagingmaterials, an odor-adsorbing packaging material, an odor-adsorbingpackaging material for BIB, and an odor-adsorbing liquid contentpackaging material for BIB prepared from the odor-adsorbing laminate(object 3).

A further object of the present invention is to provide a packageexcellent in pinhole resistance against friction, etc. during transportand excellent in resistance to leakage of liquid contents, a liquidcontent package for BIB comprising the package, and a packaging materialconstituting the package (object 4).

A further object of the present invention is to provide a package havinga double-bag portion, excellent in pinhole resistance against friction,etc. during transport and excellent in resistance to leakage of liquidcontents, a liquid content package for BIB comprising the package, and apackaging material constituting the package (object 5).

Solution to Problem

Object 1

The present inventors have conducted diligent studies and consequentlyfound that the object described above is attained by a resin compositionfor an odor-adsorbing molded article formed from a resin compositioncontained at least specific thermoplastic resin A and a specific odoradsorbent material.

Specifically, features of the present invention are as follows.

1. A resin composition for an odor-adsorbing molded article comprisingat least thermoplastic resin A and an odor adsorbent material, wherein

the odor adsorbent material comprises hydrophobic zeolite having aSiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1, and

a melt flow rate of the thermoplastic resin A is 5 g/min or more and 100g/min or less.

2. The resin composition for an odor-adsorbing molded article accordingto item 1, wherein the odor adsorbent material further comprises achemical adsorbent-supported inorganic porous material.3. The resin composition for an odor-adsorbing molded article accordingto item 1 or 2, wherein the odor adsorbent material is melt-kneaded withthermoplastic resin B in advance at an odor adsorbentmaterial/thermoplastic resin B mass ratio of 0.5/99.5 or more and 40/60or less, and a melt flow rate of the thermoplastic resin B is 5 g/min ormore and 100 g/min or less.4. The resin composition for an odor-adsorbing molded article accordingto any one of items 1 to 3, wherein the thermoplastic resin A comprisesa polyolefin resin.5. The resin composition for an odor-adsorbing molded article accordingto any one of items 1 to 4, wherein a content of the odor adsorbentmaterial in the odor-adsorbing molded article is 0.3% by mass or moreand 15% by mass or less.6. The resin composition for an odor-adsorbing molded article accordingto any one of items 1 to 5, wherein a content of the hydrophobic zeolitein the odor-adsorbing molded article is 0.3% by mass or more and 15% bymass or less.7. The resin composition for an odor-adsorbing molded article accordingto any one of items 2 to 6, wherein the chemical adsorbent of thechemical adsorbent-supported inorganic porous material has a functionalgroup reactive with one or two or more members selected from the groupconsisting of an aldehyde, a ketone, and a carboxylic acid.8. The resin composition for an odor-adsorbing molded article accordingto any one of items 1 to 7, wherein the chemical adsorbent of thechemical adsorbent-supported inorganic porous material has an aminogroup.9. The resin composition for an odor-adsorbing molded article accordingto any one of items 2 to 8, wherein a content of the chemical adsorbentof the chemical adsorbent-supported inorganic porous material in theodor-adsorbing molded article is 0.1% by mass or more and 10% by mass orless.10. An odor-adsorbing molded article prepared from a resin compositionfor an odor-adsorbing molded article according to any one of items 1 to9.11. A content spout molded article comprising an odor-adsorbing moldedarticle according to item 10.12. A content spout molded article for a BIB packaging bag comprising acontent spout molded article according to item 11.13. A BIB packaging bag having a content spout molded article for a BIBpackaging bag according to item 12.

Advantageous Effects of Invention

The resin composition for an odor-adsorbing molded article of thepresent invention contains thermoplastic resin A having a specific meltflow rate, and hydrophobic zeolite having a specific SiO₂/Al₂O₃ molarratio as an odor adsorbent material. Therefore, an odor-adsorbing moldedarticle prepared from the resin composition for an odor-adsorbing moldedarticle is effective for reducing odorous organic matter or odororiginally contained in packaging materials, and efficiently adsorbing,over a long period, odor generated by the decomposition, etc. of resinsconstituting laminates during disinfection/sterilization treatment suchas UV irradiation, γ ray irradiation, EB irradiation, hot packing, orboiling.

In the case of using an odor-adsorbing molded article prepared from theresin composition for an odor-adsorbing molded article of the presentinvention in a package, these effects can reduce the amount of organicmatter moving to contents packed therein and suppress change in tasteand odor.

Thus, the odor-adsorbing molded article prepared from the resincomposition for an odor-adsorbing molded article of the presentinvention is suitable for parts of packages for liquid foods,medicaments, and medical products to be subjected todisinfection/sterilization treatment.

Object 2

The present inventors have found that the object described above isattained by a sealant film comprising at least an outer layer film andan inner layer film, wherein the outer layer film and the inner layerfilm are adhesively bonded only partially to each other, each of theouter layer film and the inner layer film comprises a sealant layer, thesealant layer of the inner layer film comprises an odor-adsorbing layer,and the odor-adsorbing layer contains low elutable polyethylene andspecific hydrophobic zeolite as an odor adsorbent material.

Features of the present invention are as follows.

1. An odor-adsorbing sealant film comprising at least an outer layerfilm and an inner layer film, wherein the outer layer film and the innerlayer film are adhesively bonded only partially to each other, each ofthe outer layer film and the inner layer film comprises a sealant layercontaining low elutable polyethylene, the sealant layer of the innerlayer film comprises an odor-adsorbing layer, the odor-adsorbing layercontains the low elutable polyethylene and an odor adsorbent material,the odor adsorbent material comprises hydrophobic zeolite, thehydrophobic zeolite has a SiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1, anda content of the hydrophobic zeolite in the sealant layer is 0.1% bymass or more and 13% by mass or less.2. The odor-adsorbing sealant film according to item 1, wherein thesealant layer of the outer layer film further comprises theodor-adsorbing layer.3. The odor-adsorbing sealant film according to item 1, wherein the odoradsorbent material further comprises a chemical adsorbent-supportedinorganic porous material, and a content of the chemicaladsorbent-supported inorganic porous material in the sealant layer is0.1% by mass or more and 10% by mass or less.4. The odor-adsorbing sealant film according to any one of items 1 to 3,wherein a density of the low elutable polyethylene is 0.90 g/cm³ orlarger and 0.94 g/cm³ or smaller.5. The odor-adsorbing sealant film according to any one of items 1 to 4,wherein the low elutable polyethylene is LLDPE.6. The odor-adsorbing sealant film according to any one of items 1 to 5,wherein the low elutable polyethylene is one or two or more membersselected from the group consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.7. The odor-adsorbing sealant film according to any one of items 1 to 6,wherein the low elutable polyethylene which has the number of pinholesformed after 5000 Gelbo flexes at 23° C. in a 50 μm thick film is 0 or 1or more and 160 or less.8. The odor-adsorbing sealant film according to any one of items 1 to 7,wherein the low elutable polyethylene which has a concentration ofelutable TOC contained in a film prepared from only the low elutablepolyethylene is 1.5 ppm or higher and 250 ppm or lower.9. The odor-adsorbing sealant film according to any one of items 1 to 8,wherein the hydrophobic zeolite is melt-kneaded with a thermoplasticresin in advance at a hydrophobic zeolite/thermoplastic resin mass ratioof 0.5/99.5 to 40/60.10. The odor-adsorbing sealant film according to any one of items 2 to9, wherein the chemical adsorbent-supported inorganic porous material ismelt-kneaded with a thermoplastic resin in advance at a chemicaladsorbent-supported inorganic porous material/thermoplastic resin ratioof 0.5/99.5 to 40/60.11. The odor-adsorbing sealant film according to item 9 or 10, wherein amelt flow rate of the thermoplastic resin is 0.2 to 10.0 g/10 min.12. The odor-adsorbing sealant film according to any one of items 2 to11, wherein the chemical adsorbent constituting the chemicaladsorbent-supported inorganic porous material has a functional groupreactive with one or two or more members selected from the groupconsisting of an aldehyde, a ketone, and a carboxylic acid.13. The odor-adsorbing sealant film according to any one of items 2 to12, wherein the chemical adsorbent constituting the chemicaladsorbent-supported inorganic porous material has an amino group.14. The odor-adsorbing sealant film according to any one of items 1 to13, wherein

the odor-adsorbing layer comprises a non-odor-adsorbing layer on oneside or both sides, and

the non-odor-adsorbing layer is a layer that comprises low elutablepolyethylene and does not comprise the odor adsorbent material.

15. The odor-adsorbing sealant film according to any one of items 1 to14, wherein the outer layer film further comprises a base materiallayer.16. An odor-adsorbing packaging material comprising an odor-adsorbingsealant film according to any one of items 1 to 15.17. A liquid content packaging bag for BIB prepared from anodor-adsorbing packaging material according to item 16.

Advantageous Effects of Invention

The odor-adsorbing sealant film of the present invention has anodor-adsorbing layer having a specific configuration, and containsspecific low elutable polyethylene. Therefore, the odor-adsorbingsealant film is effective for reducing elutable organic matter or odororiginally contained in packaging materials, and efficiently adsorbing,over a long period, odor generated by the decomposition, etc. of resinsconstituting sealant films during disinfection/sterilization treatmentsuch as UV irradiation, γ ray irradiation, EB irradiation, hot packing,or boiling.

In the case of preparing a liquid content package using theodor-adsorbing sealant film of the present invention, these effects canreduce the amount of organic matter eluted into liquid contents packedtherein and suppress change in taste and odor.

Thus, the odor-adsorbing sealant film of the present invention issuitable for packaging bags for liquid foods, medicaments, and medicalproducts to be subjected to disinfection/sterilization treatment.

Furthermore, the odor-adsorbing sealant film of the present inventioncomprises an outer layer film and an inner layer film adhesively bondedonly partially to each other. Therefore, the odor-adsorbing sealant filmsuppresses pinhole formation ascribable to friction during transport,etc. and can suppress liquid leakage, etc.

Object 3

The present inventors have found that the object described above isattained by an odor-adsorbing laminate comprising at least a basematerial layer, an adhesion layer, and a sealant layer, wherein theadhesion layer and/or the sealant layer contains an odor adsorbentmaterial, and the odor adsorbent material comprises hydrophobic zeolitehaving a SiO₂/Al₂O₃ molar ratio of 30/1 or more and 8000/1 or less.

Features of the present invention are as follows.

1. An odor-adsorbing laminate comprising at least a base material layer,an adhesion layer, and a sealant layer, wherein the adhesion layerand/or the sealant layer contains an odor adsorbent material,

when the adhesion layer contains the odor adsorbent material, a contentof the odor adsorbent material in the adhesion layer is 0.3% by mass ormore and 50% by mass or less, when the sealant layer contains the odoradsorbent material, a content of the odor adsorbent material in thesealant layer is 0.3% by mass or more and 15% by mass or less, and theodor adsorbent material comprises hydrophobic zeolite having aSiO₂/Al₂O₃ molar ratio of 30/1 or more and 8000/1 or less.

2. The odor-adsorbing laminate according to item 1, wherein the adhesionlayer is a dry lamination adhesion layer or a non-solvent laminationadhesion layer.3. The odor-adsorbing laminate according to item 1, wherein the adhesionlayer is an extrusion coating adhesion layer or a sand laminationadhesion layer, and a content of the odor adsorbent material in theadhesion layer is 0.3% by mass or more and 15% by mass or less.4. The odor-adsorbing laminate according to any one of items 1 to 3,wherein the odor adsorbent material further comprises a chemicaladsorbent-supported inorganic porous material.5. The odor-adsorbing laminate according to any one of items 1 to 4,wherein the odor adsorbent material is melt-kneaded with thermoplasticresin A in advance at an odor adsorbent material/thermoplastic resinmass ratio of 0.5/99.5 or more and 40/60 or less.6. The odor-adsorbing laminate according to any one of items 1 to 5,wherein the adhesion layer further contains one or two or more membersselected from the group consisting of a polyurethane resin, a polyesterresin, a polyamide resin, and a polyolefin resin.7. The odor-adsorbing laminate according to any one of items 1 to 6,wherein the sealant layer further contains the said thermoplastic resinC having a melt flow rate of 0.2 g/10 min or more and 10.0 g/10 min orless.8. The odor-adsorbing laminate according to any one of items 1 to 7,wherein the adhesion layer comprises an odor-adsorbing adhesion layercontaining the odor adsorbent material, and a non-odor-adsorbingadhesion layer containing no odor adsorbent material, and thenon-odor-adsorbing adhesion layer is in contact with one side or bothsides of the odor-adsorbing adhesion layer.9. The odor-adsorbing laminate according to any one of items 1 to 8,wherein the sealant layer comprises an odor-adsorbing sealant layercontaining the odor adsorbent material, and a non-odor-adsorbing sealantlayer containing no odor adsorbent material, and the non-odor-adsorbingsealant layer is in contact with one side or both sides of theodor-adsorbing sealant layer.10. The odor-adsorbing laminate according to any one of items 4 to 9,wherein a content of the hydrophobic zeolite in the adhesion layer is0.3% by mass or more and 13% by mass or less, and a content of thechemical adsorbent-supported inorganic porous material in the adhesionlayer is 0.3% by mass or more and 10% by mass or less.11. The odor-adsorbing laminate according to any one of items 4 to 10,wherein a content of the hydrophobic zeolite in the sealant layer is0.1% by mass or more and 13% by mass or less, and a content of thechemical adsorbent-supported inorganic porous material in the sealantlayer is 0.1% by mass or more and 10% by mass or less.12. The odor-adsorbing laminate according to any one of items 4 to 11,wherein the chemical adsorbent of the chemical adsorbent-supportedinorganic porous material has a functional group reactive with one ortwo or more members selected from the group consisting of an aldehyde, aketone, and a carboxylic acid.13. The odor-adsorbing laminate according to item 12, wherein thechemical adsorbent has an amino group.14. An odor-adsorbing film for a packaging material comprising anodor-adsorbing laminate according to any one of items 1 to 13.15. An odor-adsorbing packaging material comprising an odor-adsorbingfilm for a packaging material according to item 14.16. An odor-adsorbing packaging material comprising at least an outerlayer film and an inner layer film, wherein the outer layer film and/orthe inner layer film comprises an odor-adsorbing film for a packagingmaterial according to item 14, and the outer layer film and the innerlayer film are adhesively bonded only partially to each other.17. An odor-adsorbing packaging material for BIB prepared from anodor-adsorbing packaging material according to item 16.18. An odor-adsorbing liquid content packaging material for BIB preparedfrom an odor-adsorbing packaging material according to item 16.

Advantageous Effects of Invention

The odor-adsorbing laminate of the present invention has anodor-adsorbing layer having a specific configuration. Therefore, theodor-adsorbing laminate is effective for reducing odor and efficientlyadsorbing, over a long period, odor generated by the decomposition, etc.of resins constituting laminates during disinfection/sterilizationtreatment such as UV irradiation, γ ray irradiation, EB irradiation, hotpacking, or boiling.

In the case of preparing a package using the odor-adsorbing laminate ofthe present invention, these effects can reduce the amount of organicmatter moving to contents packed therein and suppress change in tasteand odor.

Thus, the odor-adsorbing laminate of the present invention is suitablefor packaging bags for foods, medicaments, and medical products to besubjected to disinfection/sterilization treatment. The odor-adsorbinglaminate of the present invention is suitable, particularly, whencontents are liquids.

Object 4

The present inventors have found that the object described above isattained by a package having a double-bag portion comprising at least anouter layer film and an inner layer film, wherein the outer layer filmand the inner layer film are adhesively bonded only partially to eachother, each of the outer layer film and the inner layer film comprises asealant layer containing low elutable polyethylene, the sealant layer ofthe inner layer film comprises an odor-adsorbing layer, and theodor-adsorbing layer contains the low elutable polyethylene and specifichydrophobic zeolite as an odor adsorbent material.

Features of the present invention are as follows.

1. A package having a double-bag portion comprising at least an outerlayer film and an inner layer film, wherein the outer layer film and theinner layer film are adhesively bonded only partially to each other,each of the outer layer film and the inner layer film comprises asealant layer containing low elutable polyethylene, the sealant layer ofthe inner layer film comprises an odor-adsorbing layer, theodor-adsorbing layer contains the low elutable polyethylene and an odoradsorbent material, the odor adsorbent material comprises hydrophobiczeolite, the hydrophobic zeolite has a SiO₂/Al₂O₃ molar ratio of 30/1 to8000/1, and a content of the hydrophobic zeolite in the sealant layer ofthe inner layer film is 0.1% by mass or more and 13% by mass or less.2. The package according to item 1, wherein the odor adsorbent materialfurther comprises a chemical adsorbent-supported inorganic porousmaterial, and a content of the chemical adsorbent-supported inorganicporous material in the sealant layer of the inner layer film is 0.1% bymass or more and 10% by mass or less.3. The package according to item 1 or 2, wherein a density of the lowelutable polyethylene is 0.90 g/cm³ or larger and 0.94 g/cm³ or smaller.4. The package according to any one of items 1 to 3, wherein the lowelutable polyethylene is LLDPE.5. The package according to any one of items 1 to 4, wherein the lowelutable polyethylene is one or two or more members selected from thegroup consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.6. The package according to any one of items 1 to 5, wherein the lowelutable polyethylene which has the number of pinholes formed after 5000Gelbo flexes at 23° C. in a 50 μm thick film prepared from only the lowelutable polyethylene is 0 or 1 or more and 160 or less.7. The package according to any one of items 1 to 6, wherein the lowelutable polyethylene which has a concentration of elutable TOCcontained in a film prepared from only the low elutable polyethylene is1.5 ppm or higher and 250 ppm or lower.8. The package according to any one of items 1 to 7, wherein thehydrophobic zeolite is melt-kneaded with a thermoplastic resin inadvance at a hydrophobic zeolite/thermoplastic resin mass ratio of0.5/99.5 to 40/60.9. The package according to any one of items 2 to 8, wherein thechemical adsorbent-supported inorganic porous material is melt-kneadedwith a thermoplastic resin in advance at a chemical adsorbent-supportedinorganic porous material/thermoplastic resin ratio of 0.5/99.5 to40/60.10. The package according to item 8 or 9, wherein a melt flow rate ofthe thermoplastic resin is 0.2 to 10.0 g/10 min.11. The package according to any one of items 2 to 10, wherein thechemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has a functional group reactive with one ortwo or more members selected from the group consisting of an aldehyde, aketone, and a carboxylic acid.12. The package according to any one of items 2 to 11, wherein thechemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has an amino group.13. The package according to any one of items 1 to 12, wherein the innerlayer film comprises a non-odor-adsorbing layer on one side or bothsides of the odor-adsorbing layer, and the non-odor-adsorbing layer is alayer that comprises low elutable polyethylene and does not comprise theodor adsorbent material.14. The package according to any one of items 1 to 13, wherein the outerlayer film further comprises a base material layer.15. A liquid content package for BIB comprising a package according toany one of items 1 to 14.16. A packaging material constituting a package according to any one ofitems 1 to 14.

Advantageous Effects of Invention

The package of the present invention has an odor-adsorbing layer havinga specific configuration, and contains specific low elutablepolyethylene. Therefore, the package is effective for reducing elutableorganic matter or odor originally contained in packaging materials, andefficiently adsorbing, over a long period, odor generated by thedecomposition, etc. of resins constituting laminates duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

In the case of preparing a liquid content package using the package ofthe present invention, these effects can reduce the amount of organicmatter eluted into liquid contents packed therein and suppress change intaste and odor.

Thus, the package of the present invention is suitable for packagingbags for liquid foods, medicaments, and medical products to be subjectedto disinfection/sterilization treatment.

Furthermore, the double-bag portion of the package of the presentinvention comprises an outer layer film and an inner layer filmadhesively bonded only partially to each other. Therefore, the packagesuppresses pinhole formation ascribable to friction during transport,etc. and can suppress liquid leakage, etc.

Object 5

The present inventors have conducted diligent studies and consequentlyfound that the object described above is attained by a packagecomprising a double-bag portion comprising at least an outer layer filmand an inner layer film, and a content spout comprising a resin moldedarticle, wherein the outer layer film and the inner layer film areadhesively bonded only partially to each other, each of the outer layerfilm and the inner layer film comprises a sealant layer having anodor-adsorbing layer, the odor-adsorbing layer contains low elutablepolyethylene and specific hydrophobic zeolite as an odor adsorbentmaterial, and the content spout contains a polyolefin resin and thehydrophobic zeolite.

Features of the present invention are as follows.

1. A package comprising a double-bag portion comprising at least anouter layer film and an inner layer film, and a content spout comprisinga resin molded article, wherein the outer layer film and the inner layerfilm are adhesively bonded only partially to each other, each of theouter layer film and the inner layer film comprises a sealant layer, thesealant layer comprises an odor-adsorbing layer, the odor-adsorbinglayer contains low elutable polyethylene and an odor adsorbent material,the content spout contains a polyolefin resin and the odor adsorbentmaterial, the odor adsorbent material comprises hydrophobic zeolite, thehydrophobic zeolite has a SiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1, anda content of the hydrophobic zeolite in the sealant layer is 0.1% bymass or more and 13% by mass or less.2. The package according to item 1, wherein the odor adsorbent materialfurther comprises a chemical adsorbent-supported inorganic porousmaterial, and a content of the chemical adsorbent-supported inorganicporous material in the sealant layer is 0.1% by mass or more and 10% bymass or less.3. The package according to item 1 or 2, wherein a content of thehydrophobic zeolite in the content spout is 0.1% by mass or more and 13%by mass or less.4. The package according to any one of items 1 to 3, wherein the odoradsorbent material further comprises a chemical adsorbent-supportedinorganic porous material, and a content of the chemicaladsorbent-supported inorganic porous material in the content spout is0.1% by mass or more and 10% by mass or less.5. The package according to any one of items 1 to 4, wherein a densityof the low elutable polyethylene is 0.90 g/cm³ or larger and 0.94 g/cm³or smaller.6. The package according to any one of items 1 to 5, wherein the lowelutable polyethylene is LLDPE.7. The package according to any one of items 1 to 6, wherein the lowelutable polyethylene is one or two or more members selected from thegroup consisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.8. The package according to any one of items 1 to 7, wherein the lowelutable polyethylene which has the number of pinholes formed after 5000Gelbo flexes at 23° C. in a 50 μm thick film prepared from only the lowelutable polyethylene is 0 or 1 or more and 160 or less.9. The package according to any one of items 1 to 8, wherein the lowelutable polyethylene which has a concentration of elutable TOCcontained in a film prepared from only the low elutable polyethylene is1.5 ppm or higher and 250 ppm or lower.10. The package according to any one of items 1 to 9, wherein thehydrophobic zeolite is melt-kneaded with a thermoplastic resin inadvance at a hydrophobic zeolite/thermoplastic resin mass ratio of0.5/99.5 to 40/60.11. The package according to any one of items 2 to 10, wherein thechemical adsorbent-supported inorganic porous material is melt-kneadedwith a thermoplastic resin in advance at a chemical adsorbent-supportedinorganic porous material/thermoplastic resin ratio of 0.5/99.5 to40/60.12. The package according to any one of items 1 to 11, wherein a meltflow rate of the thermoplastic resin is 0.2 to 10.0 g/10 min.13. The package according to any one of items 2 to 12, wherein thechemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has a functional group reactive with one ortwo or more members selected from the group consisting of an aldehyde, aketone, and a carboxylic acid.14. The package according to any one of items 2 to 13, wherein thechemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has an amino group.15. The package according to any one of items 1 to 14, wherein the outerlayer film and/or the inner layer film comprises a non-odor-adsorbinglayer on one side or both sides of the odor-adsorbing layer, and thenon-odor-adsorbing layer is a layer that comprises low elutablepolyethylene and does not comprise the odor adsorbent material.16. The package according to any one of items 1 to 15, wherein the outerlayer film further comprises a base material layer.17. A liquid content package for BIB comprising a package according toany one of items 1 to 16.18. A packaging material constituting a package according to any one ofitems 1 to 17.

Advantageous Effects of Invention

The package of the present invention has an odor-adsorbing layer havinga specific configuration, and contains specific low elutablepolyethylene. Therefore, the package is effective for reducing elutableorganic matter or odor originally contained in packaging materials, andefficiently adsorbing, over a long period, odor generated by thedecomposition, etc. of resins constituting laminates duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

In the case of preparing a liquid content package using the package ofthe present invention, these effects can reduce the amount of organicmatter eluted into liquid contents packed therein and suppress change intaste and odor.

Thus, the package of the present invention is suitable for packagingbags for liquid foods, medicaments, and medical products to be subjectedto disinfection/sterilization treatment.

Furthermore, the double-bag portion of the package of the presentinvention comprises an outer layer film and an inner layer filmadhesively bonded only partially to each other. Therefore, the packagesuppresses pinhole formation ascribable to friction during transport,etc. and can suppress liquid leakage, etc.

BRIEF DESCRIPTION OF DRAWINGS

Object 1 (FIGS. 1 to 3)

FIG. 1 is a plane view showing one example of a package using theodor-adsorbing molded article of the present invention.

FIG. 2 is a cross-sectional view showing one example of a package usingthe odor-adsorbing molded article of the present invention.

FIG. 3 is a diagram showing the adsorption mechanism of a chemicaladsorbent-supported inorganic porous material for an odor substance.

Object 2 (FIGS. 4 to 12)

FIG. 4 is a schematic plane view showing one example of theodor-adsorbing sealant film of the present invention.

FIG. 5 shows one example of a schematic cross-sectional view taken alongcross-sectional line A of the odor-adsorbing sealant film in FIG. 4.

FIG. 6 is a cross-sectional view showing one example of the layerconfiguration of an outer layer film or an inner layer film.

FIG. 7 is a cross-sectional view showing one example of anotherembodiment of the layer configuration of the outer layer film or theinner layer film.

FIG. 8 is a cross-sectional view showing one example of a furtheralternative embodiment of the layer configuration of the outer layerfilm or the inner layer film.

FIG. 9 is a cross-sectional view showing one example of a furtheralternative embodiment of the layer configuration of the outer layerfilm or the inner layer film.

FIG. 10 is a cross-sectional view showing one example of an alternativeembodiment of the layer configuration of the outer layer film.

FIG. 11 is a diagram showing the adsorption mechanism of a chemicaladsorbent-supported inorganic porous material for an odor substance.

FIG. 12 is a schematic plane view showing one example of a liquidcontent packaging bag for BIB.

Object 3 (FIGS. 13 to 15)

FIG. 13 is a schematic cross-sectional view showing one example of thelayer configuration of the odor-adsorbing laminate of the presentinvention.

FIG. 14 is a schematic cross-sectional view showing one example ofanother embodiment of the layer configuration of the odor-adsorbinglaminate of the present invention.

FIG. 15 is a schematic cross-sectional view showing one example of afurther alternative embodiment of the layer configuration of theodor-adsorbing laminate of the present invention.

Objects 4 and 5 (FIGS. 16 to 24)

FIG. 16 is a schematic plane view showing one example of the package ofthe present invention.

FIG. 17 shows one example of a schematic cross-sectional view takenalong cross-sectional line A of the package in FIG. 16.

FIG. 18 is a schematic plane view showing one example of an inner layerfilm.

FIG. 19 shows one example of a schematic cross-sectional view takenalong cross-sectional line B of the inner layer film in FIG. 18.

FIG. 20 is a cross-sectional view showing one example of the layerconfiguration of the inner layer film.

FIG. 21 is a cross-sectional view showing one example of anotherembodiment of the layer configuration of the inner layer film.

FIG. 22 is a cross-sectional view showing one example of a furtheralternative embodiment of the layer configuration of the inner layerfilm.

FIG. 23 is a cross-sectional view showing one example of a furtheralternative embodiment of the layer configuration of the inner layerfilm.

FIG. 24 is a cross-sectional view showing one example of an alternativeembodiment of the layer configuration of the inner layer film.

DESCRIPTION OF EMBODIMENTS

Hereinafter, the present invention will be described in more detail. Thepresent invention will be described with reference to specific examples.However, the present invention is not limited by these examples.

Object 1

<Composition of Resin Composition for Odor-Adsorbing Molded Article andPurpose of Odor-Adsorbing Molded Article>

The resin composition for an odor-adsorbing molded article of thepresent invention comprises at least thermoplastic resin A and an odoradsorbent material, wherein the odor adsorbent material compriseshydrophobic zeolite having a SiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1,and a melt flow rate of the thermoplastic resin A is 5 g/min or more and100 g/min or less.

The odor-adsorbing molded article of the present invention can be used,for example, as shown in FIG. 1 or 2, as a content spout molded articlefor a packaging bag.

The odor-adsorbing molded article can also contain various plasticcompounding agents, additives, or the like for the purpose of improvingor modifying processability, heat resistance, weather resistance,mechanical properties, dimensional stability, antioxidative properties,lubricity, mold release properties, flame retardancy, antimycoticproperties, electric characteristics, strength, etc.

The resin composition for an odor-adsorbing molded article is obtainedby mixing and kneading various raw materials described above by a methodknown in the art for preparation. The odor-adsorbing molded article canbe obtained by molding the resin composition for an odor-adsorbingmolded article by a method known in the art.

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the thermoplasticresin A.

The odor adsorbent material may be mixed and kneaded directly with thethermoplastic resin A. Alternatively, a so-called master batch systemmay be performed, which involves mixing the odor adsorbent material at ahigh concentration with thermoplastic resin B, then preparing a masterbatch by melt kneading, and mixing and melt-kneading this master batchwith the thermoplastic resin A at a ratio appropriate for the targetcontent percentages.

The content of the hydrophobic zeolite in the resin composition for anodor-adsorbing molded article and the odor-adsorbing molded article ispreferably 0.3% by mass or more and 15% by mass or less.

The content of the chemical adsorbent-supported inorganic porousmaterial in the resin composition for an odor-adsorbing molded articleand the odor-adsorbing molded article is preferably 0.1% by mass or moreand 10% by mass or less.

A content smaller than the range described above makes it difficult toexert a sufficient odor-adsorbing effect. A content larger than therange described above facilitates worsening the moldability of theodor-adsorbing molded article.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the hydrophobiczeolite or the chemical adsorbent-supported inorganic porous materialinto a polyolefin resin even if the combination of the hydrophobiczeolite or the chemical adsorbent-supported inorganic porous materialwith the polyolefin resin, which easily causes aggregation, is used.

The polyolefin resin described above is preferred as the thermoplasticresin for use in the master batch. However, the thermoplastic resin isnot limited thereto, and any thermoplastic resin can be used withouthaving an adverse effect.

<Thermoplastic Resin A>

MFR (melt flow rate) of the thermoplastic resin A contained in the resincomposition for an odor-adsorbing molded article of the presentinvention is preferably 5 g/min or more and 100 g/min or less, morepreferably 10 g/min or more and 70 g/min or less.

If MFR is less than 5 g/min, the melt viscosity of the resin compositionfor an odor-adsorbing molded article is too high so that fluidity at thetime of molding is insufficient, easily causing poor molding such asincomplete packing. If MFR is larger than 100 g/min, the melt viscosityof the resin composition for an odor-adsorbing molded article is too lowso that turbulent flow occurs in the melted resin composition for anodor-adsorbing molded article at the time of molding to mix up air intothe resin composition, easily causing voids or causing sink marks on thesurface of a molded article.

In the present specification, MFR is a value measured by an approachconforming to JIS K 7210.

Specific examples of the thermoplastic resin A include, but are notlimited to, polyolefin resins, polystyrene resins, acrylonitrile-styrenecopolymers (AS resin), acrylonitrile-butadiene-styrene copolymers (ABSresin), poly(meth)acrylic resins, polyester resins, polyamide resins,polyurethane resins, acetal resins, and cellulose resins.

Among the resins described above, a polyolefin resin or a lowgas-permeable polyester resin is preferably contained.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers such as ethylene-vinyl alcohol copolymer resin,polypropylene resins, cyclic polyolefin resins, methylpentene polymers,and acid-modified polyolefin resins.

Examples of the polyester resin include, but are not limited to,polycarbonate resins, polyethylene terephthalate, and polyethylenenaphthalate.

<Thermoplastic Resin B>

The thermoplastic resin B is preferably selected as a thermoplasticresin suitable for dispersing the odor adsorbent material in masterbatch preparation.

MFR (melt flow rate) of the thermoplastic resin B is preferably 5 g/minor more and 100 g/min or less, more preferably 10 g/min or more and 70g/min or less.

If MFR is less than 5 g/min, the melt viscosity of the master batch istoo high, easily reducing the dispersibility of the odor adsorbentmaterial. If MFR is larger than 100 g/min, the melt viscosity of themaster batch is too low so that shear force is difficult to apply,easily reducing the dispersibility of the odor adsorbent material. IfMFR falls outside the range described above, the melt viscosity of theresin composition for an odor-adsorbing molded article is difficult toadjust to a proper range.

The same resin as the thermoplastic resin A contained in the resincomposition for an odor-adsorbing molded article is preferably used asthe thermoplastic resin B for use in the master batch. A polyolefinresin is more preferred. However, the thermoplastic resin is not limitedthereto, and any thermoplastic resin can be used without having anadverse effect.

Specific examples of the thermoplastic resin B include, but are notlimited to, polyolefin resins, polystyrene resins, acrylonitrile-styrenecopolymers (AS resin), acrylonitrile-butadiene-styrene copolymers (ABSresin), poly(meth)acrylic resins, polyester resins, polyamide resins,polyurethane resins, acetal resins, and cellulose resins.

Among the resins described above, a polyolefin resin or a lowgas-permeable polyester resin is preferably contained.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers such as ethylene-vinyl alcohol copolymer resin,polypropylene resins, cyclic polyolefin resins, methylpentene polymers,and acid-modified polyolefin resins.

Examples of the polyester resin include, but are not limited to,polycarbonate resins, polyethylene terephthalate, and polyethylenenaphthalate.

<Odor Adsorbent Material>

The odor adsorbent material contained in the resin composition for anodor-adsorbing molded article and the odor-adsorbing molded article ofthe present invention comprises hydrophobic zeolite having a SiO₂/Al₂O₃molar ratio of 30/1 to 8000/1 and may further comprise a chemicaladsorbent-supported inorganic porous material, if necessary.

[Hydrophobic Zeolite]

Zeolite having a higher SiO₂/Al₂O₃ molar ratio generally has higherhydrophobicity. In the present invention, the hydrophobic zeolitecontained in the odor-adsorbing layer preferably has a SiO₂/Al₂O₃ molarratio of 30/1 to 8000/1.

The hydrophobic zeolite can exert an odor-eliminating effect by theadsorption of odor components without losing the ability to adsorb odoreven when a package or a packaging material is exposed to 230° C. orhigher.

The hydrophobic zeolite can have an arbitrary outer shape such as aspherical, rod-like, or elliptic shape and may be in any form such as apowder, a mass, or particles. The form of a powder is preferred from theviewpoint of the moldability of the resin composition containing thehydrophobic zeolite, uniform dispersion in the thermoplastic resin A orB, kneading characteristics, etc.

In the present invention, the average particle size of the hydrophobiczeolite can be appropriately selected as an arbitrary average particlesize and is preferably an average particle size of 0.01 μm to 10 μm. Inthis context, the average particle size is a value measured by a dynamiclight scattering method.

If the average particle size is smaller than 0.01 μm, the hydrophobiczeolite aggregates easily with a tendency to reduce dispersibility inthe thermoplastic resin A or B. If the average particle size is largerthan 10 μm, it tends to be difficult to add a large amount of thehydrophobic zeolite because the resin composition containing thehydrophobic zeolite tends to have poor moldability. Furthermore, thepossibility arises that a sufficient odor-eliminating effect is notobtained, because the surface area is also decreased.

The hydrophobic zeolite, which is hydrophobic, has the difficulty inadsorbing highly polar water molecules or the like, but has highaffinity for low polar odor molecules, hydrophobic gases, and lipophilicgases (including solvent gases) and easily adsorbs them. The zeolitesurface exhibits basicity by the action of an alkali metal and analkaline earth metal, such as Ca, Na, and K, present on the zeolitesurface, and easily adsorbs acidic gases through neutralizationreaction.

[Chemical Adsorbent-Supported Inorganic Porous Material]

In the present invention, the chemical adsorbent-supported inorganicporous material is an inorganic porous material on which a chemicaladsorbent is supported, and has the function of adsorbing odorousorganic matter, or odor substances generated from packages duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

A supporting method known in the art or commonly used can be applied toa supporting method. For example, the inorganic porous material can beimpregnated with a solution containing the chemical adsorbent describedbelow, and dried for supporting.

In the present invention, the containment of the odor adsorbent materialcontaining the chemical adsorbent-supported inorganic porous material inan odor-adsorbing layer can drastically enhance adsorbing ability perunit mass of the chemical adsorbent and can decrease the content of thechemical adsorbent-supported inorganic porous material in theodor-adsorbing layer. Furthermore, the physical adsorptioncharacteristics of the pore portion of the inorganic porous material canalso be expected.

Owing to such a decreased content, the resin composition containing thechemical adsorbent-supported inorganic porous material acquiresexcellent fluidity and packing properties and can retain excellentmoldability required for molding materials.

The chemical adsorbent-supported inorganic porous material can have anarbitrary outer shape such as a spherical, rod-like, or elliptic shapeand may be in any form such as a powder, a mass, or particles. The formof a powder is preferred from the viewpoint of the moldability of theresin composition containing the chemical adsorbent-supported inorganicporous material, uniform dispersion in the thermoplastic resin A or B,kneading characteristics, etc.

The chemical adsorbent-supported inorganic porous material can beappropriately selected so as to have an arbitrary average particle sizeaccording to a purpose. In the present invention, the average particlesize is particularly preferably 0.01 μm to 10 μm, more preferably 0.1 μmto 8 μm, further preferably 1 μm to 7 μm. In this context, the averageparticle size is a value measured by a dynamic light scattering method.

If the average particle size is smaller than 0.01 μm, the chemicaladsorbent-supported inorganic porous material aggregates easily with atendency to reduce the dispersibility of the chemicaladsorbent-supported inorganic porous material in the thermoplastic resinA or B.

If the average particle size is larger than 10 μm, it tends to bedifficult to add a large amount of the chemical adsorbent-supportedinorganic porous material because the resin composition containing thechemical adsorbent-supported inorganic porous material has poormoldability. The possibility arises that a sufficient adsorbing effectis not obtained.

(Inorganic Porous Material)

In the present invention, an arbitrary inorganic compound having manypores on its surface can be used as the inorganic porous material.Examples thereof include zeolite, silicon dioxide, silicate, activatedcarbon, titania, inorganic phosphate such as calcium phosphate, alumina,aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

Particularly, aluminum hydroxide, zeolite, or silicate is preferablyutilized from the viewpoint of a porous state with a pore size effectivefor the molecular size or cluster size of a substance to be adsorbed,and safety.

The inorganic porous material can have an arbitrary outer shape such asa spherical, rod-like, or elliptic shape and may be in any form such asa powder, a mass, or particles. The form of a powder is preferred fromthe viewpoint of the moldability of the resin composition containing thehydrophobic zeolite after preparation of the odor adsorbent material bythe supporting of the chemical adsorbent, uniform dispersion in thethermoplastic resin A or B, kneading characteristics, etc.

The inorganic porous material can be appropriately selected so as tohave an arbitrary average particle size according to a purpose. In thepresent invention, the average particle size is particularly preferably0.01 μm to 10 μm, more preferably 0.1 μm to 8 μm, further preferably 1μm to 7 μm, for obtaining the chemical adsorbent-supported inorganicporous material having the average particle size described above.

(Chemical Adsorbent)

In the present invention, the chemical adsorbent is a compound that hasa reactive functional group binding through chemical reaction to odorousorganic matter, or an odor substance generated by the decomposition,etc. of a resin during disinfection/sterilization treatment, and can besupported onto the inorganic porous material described above.

More specifically, the chemical adsorbent is a compound having areactive functional group binding to various aldehydes, ketones,carboxylic acids, and the like resulting from disinfection/sterilizationtreatment such as UV irradiation, γ ray irradiation, EB irradiation, hotpacking, or boiling.

Examples of such a compound include compounds having a basic functionalgroup such as an amino group or a hydroxyl group, metal carbonates,metal bicarbonates, and amide group-containing compounds. Specificexamples of each compound include, but are not limited to, the followingcompounds.

Examples of the compound containing an amino group include alkylamine,ethylenediamine, tetramethylenediamine, diethylenetriamine,triethylenetriamine, tetraethylenepentamine, piperazine,m-phenylenediamine, and polyamine.

Examples of the compound having a hydroxyl group include metalhydroxides such as sodium hydroxide, potassium hydroxide, magnesiumhydroxide, and iron hydroxide.

Examples of the metal carbonate include sodium carbonate and calciumcarbonate.

Examples of the bicarbonate include sodium bicarbonate.

Examples of the amide group-containing compound include2-acrylamido-2-methylpropanesulfonate.

In the present invention, the chemical adsorbent is preferably acompound having an amino group because the compound particularly exertsan excellent adsorbing effect.

The adsorption mechanism of the chemical adsorbent for a substance to beadsorbed such as organic matter or an odor substance will be describedin more detail with reference to specific examples of FIGS. 3(a) to3(b). However, the present invention is not limited by these examples.

When the substance to be adsorbed (odor substance) is, for example, anacidic odor substance, as shown in FIG. 3(a), for example, a compoundhaving a hydroxyl group can be selected as the chemical adsorbent andsupported onto the inorganic porous material to prepare a chemicaladsorbent-supported inorganic porous material for use. As a result, thehydroxyl group causes chemical reaction with a carboxyl group so thatthe substance to be adsorbed is adsorbed.

When the substance to be adsorbed is an aldehyde, as shown in FIG. 3(b),for example, a compound having an amino group can be selected as thechemical adsorbent and supported onto the inorganic porous material toprepare a chemical adsorbent-supported inorganic porous material foruse. As a result, the aldehyde group causes chemical reaction with anamino group so that the substance to be adsorbed is adsorbed.

By such chemical adsorption, odor can be efficiently adsorbed withoutdesorbing the substance to be adsorbed (odor substance) once adsorbed.

Unlike a physical adsorbent which adsorbs a substance to be adsorbed(odor substance) and water vapor at the same adsorption site, thechemical adsorbent according to the present invention binds, at itsspecific functional group, to the substance to be adsorbed and istherefore insusceptible to various substances reducing the ability toadsorb odor, for example, water vapor.

<Preparation of Resin Composition for Odor-Adsorbing Molded Article>

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the thermoplasticresin A.

The odor adsorbent material may be mixed and kneaded directly with thethermoplastic resin A. Alternatively, a so-called master batch systemmay be performed, which involves mixing the odor adsorbent material at ahigh concentration with thermoplastic resin B, then preparing a masterbatch by melt kneading, and mixing and melt-kneading this master batchwith the thermoplastic resin A at a ratio appropriate for the targetcontent percentages.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the odor adsorbentmaterial into the thermoplastic resin A even if the combination of theodor adsorbent material with the thermoplastic resin A, which easilycauses aggregation, is used.

In this respect, the thermoplastic resin B in the master batch may ormay not be the same as the thermoplastic resin A in the resincomposition for an odor-adsorbing molded article. Thermoplastic resinsof the same type may be combined according to a purpose.

For example, provided that the odor adsorbent material and thethermoplastic resin B are melt-mixed in advance, homogeneous andfavorable moldability and odor-adsorbing properties can be obtained bymixing or melt kneading with the thermoplastic resin B again.

The resin composition for an odor-adsorbing molded article may contain athermoplastic resin other than the thermoplastic resin A. Such athermoplastic resin preferably has a melt flow rate equivalent to thatof the thermoplastic resin A and can be used without having asignificant adverse effect on the moldability and odor-adsorbingproperties of the resin composition for an odor-adsorbing moldedarticle.

<Molding into Odor-Adsorbing Molded Article>

The odor-adsorbing molded article can be prepared at 100 to 250° C. by amolding approach known in the art such as injection molding or transfermolding using the resin composition for an odor-adsorbing moldedarticle.

<Content Spout>

The odor-adsorbing molded article of the present invention can be usedin a content spout for a package such as packaging bags.

The content spout is an entrance and/or exit port through which contentsare packed and/or taken out. The contents may be packed into and takenout of one content spout, or two or more content spouts may be providedand the contents can be packed into and taken out of the separatecontent spouts.

The content spout is not particularly limited by its installationposition and is preferably installed at or near an end portion of apackage.

The content spout can be constituted by, for example, as shown in FIG.2, a flange at a lower end, a cylindrical part installed in a hole of aninner bag by the flange, and a cap fitted and fixed to the opening ofthis cylindrical part.

All the spout, the connector, and the cap are preferably formed from theresin composition for an odor-adsorbing molded article and may have thesame or different composition as or from each other.

<Packaging Bag>

The packaging bag using the odor-adsorbing molded article of the presentinvention as a content spout is a packaging bag that is packed withcontents, for example, a liquid content packaging bag.

The packaging bag can be prepared, for example, by using a packagingmaterial having heat sealing properties, bending the packaging materialor overlaying two such packaging materials such that faces havingfavorable heat sealing properties are opposed to each other, andheat-sealing peripheral edges in a heat-seal form, for example, lateralseal type, two-sided seal type, three-sided seal type, four-sided sealtype, envelope-like seal type, center seal type (pillow seal type),pleated seal type, flat bottom seal type, square bottom seal type, or agazette type.

A method known in the art, for example, bar sealing, rotating rollsealing, belt sealing, impulse sealing, high-frequency sealing, orultrasonic sealing can be applied to a heat sealing method.

<BIB Packaging Bag>

The BIB (bag in box) packaging bag is a package in which a packaging bagor a molded container having a content spout is housed in a cardboardbox or the like.

<Content>

In the present invention, the contents are not particularly limited, andfoods or medicaments are suitable because the odor-adsorbing moldedarticle or the packaging bag of the present invention is subjected todisinfection/sterilization treatment or odor components move thereto andoffer strange taste or strange odor.

Examples of the liquid contents include general liquids such as drinkingwater, juices, drip infusions, seasoning liquids such as soy sauce andsauce, soups, honey, baste, and dressing.

Object 2

<Odor-Adsorbing Sealant Film>

The odor-adsorbing sealant film of the present invention comprises, asshown in FIG. 4 or 5, at least an outer layer film and an inner layerfilm, wherein the outer layer film and the inner layer film areadhesively bonded only partially to each other.

The adhesively bonded portion between the outer layer film and the innerlayer film is preferably located at least at the periphery of theodor-adsorbing sealant film and is in a lattice shape composed ofcontinuous lines, in a shape composed of discontinuous lines, or in adot shape.

When the odor-adsorbing sealant film of the present invention is used asa packaging material, pinhole resistance is important, particularly, forpackaging materials for foods or medical products, etc. because fatiguefailure progresses due to local repeated flexion ascribable to vibrationduring a packaging step or during transport, or due to the contact ofpackage parts such as a content spout so that pinholes, which causeleakage of liquid contents in liquid content packages for BIB used, areformed.

For use in aseptic packaging, packages are disinfected with an electronbeam, a γ ray, ethylene oxide gas, or the like and then supplied tosubsequent steps or users.

<Layer Configurations of Outer Layer Film and Inner Layer Film>

Each of the outer layer film and the inner layer film is a film havingat least a sealant layer containing low elutable polyethylene.

The sealant layer of the inner layer film comprises an odor-adsorbinglayer. The sealant layer of the outer layer film can also comprise theodor-adsorbing layer, if necessary.

The sealant layer having the odor-adsorbing layer may be a layerconsisting of the odor-adsorbing layer as shown in FIG. 6, or may have amultilayered structure with a non-odor-adsorbing layer containing lowelutable polyethylene but containing no odor adsorbent material, inorder to improve sealing strength and interlayer adhesion strength, asshown in FIG. 7 or 8.

As shown in FIG. 9, the odor-adsorbing layer may have a multilayeredstructure having the same or different types of low elutablepolyethylene as a main component or the same or different types orcontents of the odor adsorbent material.

In a packaging bag using the odor-adsorbing sealant film of the presentinvention, an innermost layer, which comes into contact with liquidcontents, may be an odor-adsorbing layer or may be a non-odor-adsorbinglayer. The non-odor-adsorbing layer serving as an innermost layer canimprove the sealing strength of the packaging bag. The odor-adsorbinglayer serving as an innermost layer can improve interlayer adhesionstrength within the packaging bag.

Each of the outer layer film and the inner layer film can also comprise,as shown in FIG. 10, a base material layer, a functional layer such as areinforcing layer, an adhesion layer, or the like in order to improvethe strength of the film or impart various functions thereto.Particularly, the outer layer film preferably comprises a base materiallayer. A layer known in the art can be laminated for use as the basematerial layer, the functional layer, or the adhesion layer by a methodknown in the art.

<Sealant Layers of Outer Layer Film and Inner Layer Film>

The sealant layer of the inner layer film comprises an odor-adsorbinglayer and may further comprise a non-odor-adsorbing layer.

The sealant layer of the outer layer film can comprise anon-odor-adsorbing layer and/or an odor-adsorbing layer.

[Odor-Adsorbing Layer]

The odor-adsorbing layer according to the present invention comprise aresin composition comprising low elutable polyethylene and an odoradsorbent material.

The resin composition may further comprise general-purpose polyethylene,polypropylene, a methylpentene polymer, an acid-modified polyolefinresin, and a mixture of these thermoplastic resins, etc., withoutinhibiting the low eluting properties or heat sealing properties of thesealant film, though the resin is not limited thereto.

In one embodiment of the present invention, the odor-adsorbing layer hasa single-layered configuration formed using a resin composition obtainedby kneading the odor adsorbent material and the low elutablepolyethylene. In this context, the odor adsorbent material may beuniformly dispersed in the layer or may be dispersed with aconcentration gradient.

For example, the odor adsorbent material may be dispersed with aconcentration gradient on the increase from the inner surface toward theouter surface at the time of package formation. This configurationimproves heat sealing properties. In contrast to this, the odoradsorbent material may be dispersed with a concentration gradient on thedecrease from the inner surface toward the outer surface at the time ofpackage formation. This configuration improves interlayer adhesionstrength.

Alternatively, the odor adsorbent material may be dispersed with aconcentration gradient on the decrease from the central portion in thethickness direction of the odor-adsorbing layer toward both surfaces.This configuration improves heat sealing properties and interlayeradhesion strength.

In another embodiment, the odor-adsorbing layer may have a multilayeredconfiguration in which two or more layers are laminated. In thiscontext, these layers may comprise resin compositions differing in thetype of the low elutable polyethylene as a main component or the type orcontent of the odor adsorbent material.

The total layer thickness of the odor-adsorbing layer can be at least 5μm for film formation and is preferably 10 μm to 200 μm for obtainingfavorable film formability, heat sealing properties, interlayer adhesionstrength and odor-adsorbing properties.

The odor adsorbent material comprises hydrophobic zeolite and canfurther comprise a chemical adsorbent-supported inorganic porousmaterial.

The hydrophobic zeolite or the chemical adsorbent-supported inorganicporous material may be mixed and kneaded directly with the low elutablepolyethylene. Alternatively, a so-called master batch system may beperformed, which involves mixing the hydrophobic zeolite or the chemicaladsorbent-supported inorganic porous material at a high concentrationwith a thermoplastic resin, then preparing a master batch by meltkneading, and mixing and melt-kneading this master batch with the lowelutable polyethylene at a ratio appropriate for the target contentpercentages.

In the present invention, the amount of the hydrophobic zeolite addedcan be at least 0.05% by mass of the hydrophobic zeolite contained inthe sealant layer comprising the odor-adsorbing layer, for exerting asufficient odor-adsorbing effect, and is preferably 0.1% by mass ormore, more preferably 0.25% by mass or more, for obtaining a favorableodor-adsorbing effect as a package. On the other hand, the content ofthe hydrophobic zeolite is preferably 13% by mass or less, morepreferably 10% by mass or less, for obtaining favorable film formabilityat the time of laminate preparation and, in addition, for achievingfavorable heat sealing properties.

The content of the chemical adsorbent-supported inorganic porousmaterial can be at least 0.05% by mass of the chemicaladsorbent-supported inorganic porous material contained in the sealantlayer comprising the odor-adsorbing layer, for exerting a sufficientadsorbing effect, and is preferably 0.1% by mass or more, morepreferably 0.25% by mass or more, for obtaining a favorable adsorbingeffect as a package.

On the other hand, the content of the chemical adsorbent-supportedinorganic porous material is preferably 10% by mass or less, morepreferably 9% by mass or less, in the sealant layer comprising theodor-adsorbing layer, for obtaining favorable film formability at thetime of laminate preparation and, in addition, for achieving favorableheat sealing properties.

[Low Elutable Polyethylene]

In the present invention, the sealant layer of each of the outer layerfilm and the inner layer film has heat sealing properties and containslow elutable polyethylene attaining a small amount of organic mattereluted.

Such a small amount of organic matter eluted can decrease theconcentration of organic matter eluted into liquid contents packed inthe package of the present invention and suppress change in taste andodor.

In this context, the concentration of the organic matter in liquidcontents is indicated by the concentration of TOC (total organic carbon)in the present invention.

TOC represents the total concentration organic matter (organic carbon)oxidizable in water by the concentration of carbon. TOC is used as atypical water quality index and is standardized by JIS K 0805 (automatictotal organic carbon (TOC) analyzer), etc.

The concentration of elutable TOC contained in a film consisting of thelow elutable polyethylene is 1.5 ppm or higher and 250 ppm or lower.

In this context, the concentration of elutable TOC as to the lowelutable polyethylene as a single raw material is measured in a filmstate, not in a state such as raw material pellets, because the lowelutable polyethylene may increase the amount of TOC eluted by theapplication of various heat histories, etc. during film preparation suchas sealant layer formation.

After packing of 1 kg of distilled water as filling water into a 15cm×44 cm×50 μm thick pouch packaging bag prepared from the low elutablepolyethylene according to the present invention, followed by elution,the increased concentration of TOC in the filling water is preferably0.01 ppm or higher and 1.5 ppm or lower, more preferably 0.02 ppm orhigher and 1.45 ppm or lower, further preferably 0.025 ppm or higher and1.4 ppm or lower.

If the increased concentration of TOC in the filling water is largerthan 1.5 ppm, it is difficult to suppress change in taste and odor ofthe filling water. In order to obtain this concentration of smaller than0.01 ppm, effects are limited though cost is high. The range describedabove is preferred from the viewpoint of the balance between cost andperformance.

In order to specifically determine the increased concentration of TOC,for example, 1000 g of distilled water of 40° C. to 80° C. is packed asfilling water into the pouch packaging bag described above, which isthen stored at 25° C. to 50° C. for several days to 4 weeks. Then, theTOC concentration of the filling water is measured using a total organiccarbon meter or HS-GC. The TOC concentration of the distilled water as ablank can be subtracted therefrom to determine the increasedconcentration of TOC.

In the present invention, the increased concentration of TOC isdetermined by a standard method which involves preparing a package of apouch bag (15 cm×44 cm) using the outer layer film, the inner layerfilm, and the odor-adsorbing sealant film, packing thereinto 1000 g ofwater (distilled water for high-performance liquid chromatography,Junsei Chemical Co., Ltd.) of 65° C. to prepare a liquid-packed package,which is then stored at 35° C. for 2 weeks, and then measuring the TOCconcentration of the filling water using TOC-L total organic carbonmeter manufactured by Shimadzu Corp.

Then, the concentration of elutable TOC contained in the sealant film iscalculated from the obtained increased TOC concentration of the fillingwater, parts by mass of the filling water, and parts by mass of thesealant film.

Specific examples of the low elutable polyethylene include low-elutionresins such as low-density polyethylene (LDPE), medium-densitypolyethylene (MDPE), high-density polyethylene (HDPE), linearlow-density polyethylene (LLDPE), ethylene-vinyl acetate copolymers,ethylene-ethyl acrylate copolymers, ethylene-acrylic acid copolymers,ethylene-methacrylic acid copolymers, ethylene-methyl methacrylatecopolymers, and ethylene-propylene copolymers, and mixtures of theseresins, though the low elutable polyethylene is not limited to theseresins.

Examples of the method for decreasing the amount of organic mattereluted from a low elutable polyethylene film include, but are notlimited to, the following methods.

Decrease in residual amounts of unreacted raw materials or amounts oflow-molecular-weight products or by-products, or the removal of apolymerization catalyst in the production of the polyethylene iseffective. A specific method involves improving a raw material purity,precisely controlling conditions such as a reaction temperature or apressure, removing unreacted raw materials, low-molecular-weightproducts, by-products or a polymerization catalyst by distillation orwashing, or preventing oxidation ascribable to contact with oxygen inair at a high temperature.

For the pelletization of the produced polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, and other additiveswhich may elevate the amount of organic matter eluted.

For the film preparation of the polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, a solvent, and otheradditives which may elevate the amount of organic matter eluted, orpreventing oxidation ascribable to a high temperature.

In the present invention, the sealant layer has heat sealing propertiesand contains low elutable polyethylene. Thus, a packaging materialprepared from the odor-adsorbing sealant film has excellent heat sealingproperties, attains a small amount of organic matter eluted, and canreduce increase in TOC concentration in liquid contents in the package.

The polyethylene is suitable because of its properties of beingresistant to sterilization/disinfection treatment such as UV and beingless decomposable.

Among these low elutable polyethylenes, the type is preferably LLDPE.Since LLDPE having a C4, C6, or C8 side chain tends to be capable ofdecreasing the amount of organic matter eluted, C4-LLDPE, C6-LLDPE,C8-LLDPE, or the like is more preferred.

In this context, C4, C6, or C8 means that a monomer having the describednumerical value as the number of carbon atoms is present at a side chainby partial copolymerization with LLDPE. For example, C4 represents aside chain having a butene-1 structure; C6 represents a side chainhaving a hexene-1 or 4-methylpentene-1 structure; and C8 represents aside chain having an octene-1 structure.

Alternatively, low elutable polyethylene having a density of 0.90 g/cm³or larger and 0.94 g/cm³ or smaller is preferred, and low elutablepolyethylene having a density of 0.905 g/cm³ or larger and 0.933 g/cm³or smaller is more preferred. The low elutable polyethylene having adensity within this range tends to be capable of decreasing the amountof organic matter eluted.

The low elutable polyethylene may contain a small amount of an additivesuch as an antioxidant or an antiblocking agent.

The low elutable polyethylene according to the present invention ispreferably excellent in resistance to pinholes attributed to flexionwhen singly prepared into a film.

As for the pinhole resistance of the low elutable polyethylene accordingto the present invention, for example, the number of pinholes formedafter 5000 Gelbo flexes at 23° C. in a 50 μm thick film consisting ofthe low elutable polyethylene singly is preferably 0 or 1 or more and160 or less.

When the number of pinholes formed in the sealant film falls within therange described above, a packaging material workable for an applicationrequiring pinhole resistance can be prepared.

[Odor Adsorbent Material]

In the present invention, the odor adsorbent material comprises specifichydrophobic zeolite and can further comprise a chemicaladsorbent-supported inorganic porous material.

(Hydrophobic Zeolite)

The hydrophobic zeolite is the same as in the object 1.

(Chemical Adsorbent-Supported Inorganic Porous Material)

In the present invention, the chemical adsorbent-supported inorganicporous material is an inorganic porous material on which a chemicaladsorbent is supported, and has the function of adsorbing elutableorganic matter, or odor substances generated from packages duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

A supporting method known in the art or commonly used can be applied toa supporting method. For example, the inorganic porous material can beimpregnated with a solution containing the chemical adsorbent describedbelow, and dried for supporting.

In the present invention, the containment of the odor adsorbent materialcontaining the chemical adsorbent-supported inorganic porous material inan odor-adsorbing layer can drastically enhance adsorbing ability perunit mass of the chemical adsorbent and can decrease the content of thechemical adsorbent-supported inorganic porous material in theodor-adsorbing layer. Furthermore, the physical adsorptioncharacteristics of the pore portion of the inorganic porous material canalso be expected.

Owing to such a decreased content, the sealant film acquires highsealing strength and can retain excellent heat sealing properties andfilm formability required for sealant films.

The chemical adsorbent-supported inorganic porous material can have anarbitrary outer shape such as a spherical, rod-like, or elliptic shapeand may be in any form such as a powder, a mass, or particles. The formof a powder is preferred from the viewpoint of the film formability ofthe odor-adsorbing layer, uniform dispersion in a thermoplastic resin,kneading characteristics, etc.

The chemical adsorbent-supported inorganic porous material can beappropriately selected so as to have an arbitrary average particle sizeaccording to a purpose. In the present invention, the average particlesize is particularly preferably 0.01 μm to 10 μm, more preferably 0.1 μmto 8 μm, further preferably 1 μm to 7 μm. In this context, the averageparticle size is a value measured by a dynamic light scattering method.

If the average particle size is smaller than 0.01 μm, the chemicaladsorbent-supported inorganic porous material aggregates easily with atendency to reduce the dispersibility of the chemicaladsorbent-supported inorganic porous material in the low elutablepolyethylene.

If the average particle size is larger than 10 μm, it tends to bedifficult to add a large amount of the chemical adsorbent-supportedinorganic porous material because the odor-adsorbing layer has poor filmformability. The possibility arises that a sufficient adsorbing effectis not obtained.

(Inorganic Porous Material)

In the present invention, an arbitrary inorganic compound having manypores on its surface can be used as the inorganic porous material.Examples thereof include zeolite, silicon dioxide, silicate, activatedcarbon, titania, inorganic phosphate such as calcium phosphate, alumina,aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

Particularly, aluminum hydroxide, zeolite, or silicate is preferablyutilized from the viewpoint of a porous state with a pore size effectivefor the molecular size or cluster size of a substance to be adsorbed,and safety.

The inorganic porous material can have an arbitrary outer shape such asa spherical, rod-like, or elliptic shape and may be in any form such asa powder, a mass, or particles. The form of a powder is preferred fromthe viewpoint of the film formability of the odor-adsorbing layer afterpreparation of the odor adsorbent material by the supporting of thechemical adsorbent, uniform dispersion in a thermoplastic resin,kneading characteristics, etc.

The inorganic porous material can be appropriately selected so as tohave an arbitrary average particle size according to a purpose. In thepresent invention, the average particle size is particularly preferably0.01 μm to 10 μm, more preferably 0.1 μm to 8 μm, further preferably 1μm to 7 μm, for obtaining the chemical adsorbent-supported inorganicporous material having the average particle size described above.

(Chemical Adsorbent)

The chemical adsorbent is the same as in the object 1.

<Method for Preparing Outer Layer Film or Inner Layer Film>

(Method for Dispersing Odor Adsorbent Material)

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the low elutablepolyethylene.

The odor adsorbent material may be mixed and kneaded directly with thelow elutable polyethylene. Alternatively, a so-called master batchsystem may be performed, which involves mixing the odor adsorbentmaterial at a high concentration with a thermoplastic resin, thenpreparing a master batch by melt kneading, and mixing and melt-kneadingthis master batch with the low elutable polyethylene at a ratioappropriate for the target content percentages.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the odor adsorbentmaterial into the low elutable polyethylene even if the combination ofthe odor adsorbent material with the low elutable polyethylene, whicheasily causes aggregation, is used.

In this respect, the thermoplastic resin in the master batch may or maynot be the same as the low elutable polyethylene in the odor-adsorbinglayer. Low elutable polyethylenes of the same type or the low elutablepolyethylene and a thermoplastic resin of different type may be combinedaccording to a purpose.

For example, provided that the odor adsorbent material and the lowelutable polyethylene are melt-mixed in advance, homogeneous andfavorable film formability, heat sealing properties, interlayer adhesionstrength and odor-adsorbing properties can be obtained by mixing or meltkneading with the low elutable polyethylene again.

Examples of the thermoplastic resin other than the low elutablepolyethylene in the odor-adsorbing layer include polyolefin resins suchas general-purpose non-low-elutable polyethylene, polypropylene,methylpentene polymers, and acid-modified polyolefin resins, andmixtures of these resins, though the thermoplastic resin is not limitedto these resins.

The thermoplastic resin preferably has low eluting properties equivalentto that of the low elutable polyethylene according to the presentinvention, and a general-purpose thermoplastic resin can be used withouthaving a significant adverse effect on the amount of organic mattereluted from the whole sealant layer.

(Film Formation and Lamination Methods)

In the present invention, the film formation and lamination methods foreach layer of the outer layer film or the inner layer film are notparticularly limited, and a film formation method and a laminationmethod known in the art or commonly used can be applied thereto.

The odor-adsorbing layer or the non-odor-adsorbing layer may belaminated onto a different layer, optionally via an adhesion layer, byextrusion coating, or, for example, a plurality of odor-adsorbing layersand non-odor-adsorbing layers may be formed by coextrusion according toan inflation method or a casting method.

For the lamination by extrusion coating, first, a resin compositionforming the odor-adsorbing layer or a resin composition forming thenon-odor-adsorbing layer is melted by heating, expanded and extended ina necessary width direction using a T-die, and extruded into acurtain-like form. The melted resin is allowed to flow down onto asurface to be laminated, which is then sandwiched between a rubber rolland a cooled metal roll to perform the formation of the odor-adsorbinglayer or the non-odor-adsorbing layer and its adhesive bonding andlamination to the surface to be laminated at the same time.

For the lamination by extrusion coating, the melt flow rate (MFR) of thelow elutable polyethylene contained in the odor-adsorbing layer or thethermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 50 g/10 min, more preferably 0.5 to 30 g/10 min. Inthe present specification, MFR is a value measured by an approachconforming to JIS K 7210.

If MFR is less than 0.2 g/min or more than 50 g/min, processingsuitability is less effective.

In the case of using an inflation method, the melt flow rate (MFR) ofthe low elutable polyethylene contained in the odor-adsorbing layer orthe thermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 10.0 g/10 min, more preferably 0.2 to 9.5 g/10 min.

If MFR is less than 0.2 g/10 min or more than 10.0 g/10 min, processingsuitability tends to be poor.

Alternatively, the odor-adsorbing layer and the non-odor-adsorbing layerfilm-formed in advance may be laminated via an adhesion layer by drylamination, non-solvent lamination, sand lamination, or the like.

<Adhesion Layer>

In the present invention, an adhesion layer may be provided betweenlayers in the sealant layer or between the sealant layer and the basematerial layer, etc. for lamination.

The adhesion layer may comprise an adhesive or an arbitrary anchorcoating agent.

The adhesive can be of thermosetting type, ultraviolet cure type,electron beam cure type, or the like and may be in any form such as anaqueous, solution, emulsion, or dispersed form. Its nature is in anyform such as a film or sheet, a powder, or a solid. The adhesionmechanism may be in any form such as chemical reaction, solventvolatilization, heat melting, or thermal compression.

The adhesion layer can be an EC (extrusion coating) layer or a layercomprising an adhesive for dry lamination, an adhesive for non-solventlamination, or the like.

Examples of the component forming such an adhesion layer includepolyvinyl acetate adhesives such as polyvinyl acetate and vinylacetate-ethylene copolymers, polyacrylic acid adhesives consisting of acopolymer of polyacrylic acid with polystyrene, polyester, polyvinylacetate, or the like, cyano acrylate adhesives, ethylene copolymeradhesives consisting of a copolymer of ethylene with a monomer such asvinyl acetate, ethyl acrylate, acrylic acid, or methacrylic acid,cellulose adhesives, polyurethane adhesives, polyester adhesives,polyamide adhesives, polyimide adhesives, polyolefin adhesives such asLDPE, amino resin adhesives consisting of urea resin or melamine resin,phenol resin adhesives, epoxy adhesives, reactive (meth)acrylicadhesives, elastomer adhesives consisting of chloroprene rubber, nitrilerubber, styrene-butadiene rubber, or the like, silicone adhesives, andinorganic adhesives consisting of alkali metal silicate, low-meltingglass, or the like.

For example, an organotitanium, isocyanate, polyethylenimine,acid-modified polyethylene, or polybutadiene anchor coating agent can beused as the anchor coating agent.

In the case of laminating the adhesion layer by extrusion coating, alayer to be adhesively bonded can be extrusion-coated with the adhesiveto form the adhesion layer, though the method is not particularlylimited thereto.

For the extrusion coating, first, the adhesive is melted by heating,expanded and extended in a necessary width direction using a T-die, andextruded into a curtain-like form. The melted product is allowed to flowdown onto a layer to be adhesively bonded, which is then sandwichedbetween a rubber roll and a cooled metal roll to perform the formationof the adhesion layer and its adhesive bonding and lamination to thelayer to be adhesively bonded at the same time.

In the case of using an adhesive for dry lamination in the adhesionlayer, the adhesive dispersed or dissolved in a solvent is applied ontoone of the layers and dried, and the other layer to be adhesively bondedis overlaid and laminated thereto. Then, the adhesive is cured by agingat 30 to 120° C. for several hours to several days for lamination.

In the case of using an adhesive for non-solvent lamination, theadhesive itself is applied, without being dispersed or dissolved in asolvent, onto one of the layers and dried, and the other layer to beadhesively bonded is overlaid and laminated thereto. Then, the adhesiveis cured by aging at 30 to 120° C. for several hours to several days forlamination.

The adhesion layer is formed by, for example, roll coating, gravure rollcoating, or kiss coating with the adhesive. The amount of coating isdesirably on the order of 0.1 to 10 g/m² (dry state). When the amount ofcoating with the adhesive falls within the range described above,favorable adhesiveness is obtained.

For the lamination by sand lamination, an arbitrary resin that can bemelted by heating and applied to an extruder can be used in the adhesionlayer. Specifically, the thermoplastic resin for use in thenon-odor-adsorbing layer described above can be preferably used.

<Packaging Material>

The odor-adsorbing sealant film of the present invention can be useddirectly or after being laminated with a base material layer or afunctional layer, if necessary, to prepare a packaging material. Theodor-adsorbing sealant film of the present invention is also suitable,particularly, for a packaging material for a liquid content for BIB.

<Package and Liquid Content Packaging Bag for BIB>

The package of the present invention is used as, for example, a liquidcontent packaging bag for BIB and subjected to the packing of contentsin a hermetically sealed state with its content spout capped.Specifically, the hermetically sealed liquid content package for BIB,when used for an ordinary purpose, is placed in a cardboard box andsupplied to a user. The hermetically sealed liquid content package forBIB, when used in aseptic packaging, is disinfected with an electronbeam, a γ ray, ethylene oxide gas, or the like and then supplied to auser.

The liquid content packaging bag for BIB of the present invention isconstituted by, for example, as shown in FIG. 11, at least a double-bagportion comprising a packaging material prepared from the odor-adsorbingsealant film of the present invention, and a content spout comprising aresin molded article.

The double-bag portion is constituted by, as shown in FIG. 11 or 12, anupper film and a lower film, and the content spout is installed in theupper film.

<Liquid Content>

In the present invention, the liquid contents refer to general liquidssuch as drinking water, juices, drip infusions, seasoning liquids suchas soy sauce and sauce, soups, honey, baste, and dressing.

[Method for Preparing Package]

The package of the present invention can be prepared, for example, asshown in FIG. 12, by bending a packaging material or overlaying twopackaging materials such that the sealant layer of the contentspout-installed upper film and the sealant layer of the lower film areopposed to each other, and heat-sealing peripheral edges in a heat-sealform, for example, lateral seal type, two-sided seal type, three-sidedseal type, four-sided seal type, envelope-like seal type, center sealtype (pillow seal type), pleated seal type, flat bottom seal type,square bottom seal type, or a gazette type.

A method known in the art, for example, bar sealing, rotating rollsealing, belt sealing, impulse sealing, high-frequency sealing, orultrasonic sealing can be applied to a heat sealing method.

The method for installing the content spout in the upper film involvesmaking a hole at a content spout installation position of the upperfilm, inserting the content spout to the hole from the inner side of theupper film, fixing the inner face of the upper film to the outer side ofa flange of the content spout by heat sealing, and further capping thecontent spout to create a hermetically sealed state.

<Content Spout>

The content spout is an entrance and/or exit port through which contentsare packed and/or taken out. The contents may be packed into and takenout of one content spout, or two or more content spouts may be providedand the contents can be packed into and taken out of the separatecontent spouts.

The content spout is not particularly limited by its installationposition and is preferably installed at or near any of four sides of thepackage.

The content spout contains a polyolefin resin.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers, polypropylene resins, cyclic polyolefin resins,methylpentene polymers, and acid-modified polyolefin resins.

The melt flow rate of the polyolefin resin is preferably 5 g/min or moreand 100 g/min or less from the viewpoint of moldability.

The content spout can also contain various plastic compounding agents,additives, or the like for the purpose of improving or modifyingprocessability, heat resistance, weather resistance, mechanicalproperties, dimensional stability, antioxidative properties, lubricity,mold release properties, flame retardancy, antimycotic properties,electric characteristics, strength, etc.

The content spout may further contain low elutable polyethylene or anodor adsorbent material, if necessary.

The content spout can be obtained by mixing and kneading various rawmaterials described above by a method known in the art to prepare aresin composition, and molding the resin composition by a method knownin the art.

Object 3

<Layer Configuration of Odor-Adsorbing Laminate>

The odor-adsorbing laminate of the present invention comprises at leasta base material layer, an adhesion layer, and a sealant layer, whereinthe adhesion layer and/or the sealant layer contains an odor adsorbentmaterial.

<Odor Adsorbent Material>

In the present invention, the odor adsorbent material comprises specifichydrophobic zeolite and can further comprise a chemicaladsorbent-supported inorganic porous material.

The odor adsorbent material may be mixed and kneaded directly with aresin constituting each layer. A so-called master batch system may beused, which involves mixing the odor adsorbent material at a highconcentration with thermoplastic resin A, then preparing a master batchby melt kneading, and mixing and melt-kneading this master batch withthe resin constituting each layer at a ratio appropriate for the targetcontent percentages.

[Master Batching of Odor Adsorbent Material]

The master batching can homogeneously disperse the odor adsorbentmaterial into the resin constituting each layer even if the combinationof the odor adsorbent material with the resin, which easily causesaggregation, is used.

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the thermoplasticresin A.

In this respect, the thermoplastic resin A in the master batch may ormay not be the same as the resin in each layer. Resins of the same typeor resins of different types may be combined according to a purpose.

For example, provided that the thermoplastic resin A is the same as theresin constituting each layer, homogeneous and favorable filmformability, interlayer adhesion strength, heat sealing properties, etc.can be retained and excellent odor-adsorbing properties can be obtained,by mixing or melt kneading with the thermoplastic resin A again for eachlayer.

The content percentage of the odor adsorbent material in the masterbatch is preferably 0.5% by mass or more and 40% by mass or less, morepreferably 1% by mass or more and 20% by mass or less.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

[Thermoplastic Resin A]

In the master batch of the odor adsorbent material, the thermoplasticresin A dispersing the odor adsorbent material is not particularlylimited as long as the thermoplastic resin is capable of dispersing theodor adsorbent material in the master batch and is easily kneaded andhomogenized with good affinity for the resin of each layer to besupplemented with the master batch. Resins of the same type or resins ofdifferent types may be combined according to a purpose.

[Hydrophobic Zeolite]

Zeolite having a higher SiO₂/Al₂O₃ molar ratio generally has higherhydrophobicity. In the present invention, the hydrophobic zeolitecontained in the odor-adsorbing layer preferably has a SiO₂/Al₂O₃ molarratio of 30/1 to 8000/1.

The hydrophobic zeolite can exert an odor-eliminating effect by theadsorption of odor components without losing the ability to adsorb odoreven when a package or a packaging material is exposed to 230° C. orhigher.

The hydrophobic zeolite can have an arbitrary outer shape such as aspherical, rod-like, or elliptic shape and may be in any form such as apowder, a mass, or particles. The form of a powder is preferred from theviewpoint of uniform dispersion in a resin, kneading characteristics,subsequent film formability, etc.

In the present invention, the average particle size of the hydrophobiczeolite can be appropriately selected as an arbitrary average particlesize and is preferably an average particle size of 0.01 μm to 10 μm. Inthis context, the average particle size is a value measured by a dynamiclight scattering method.

If the average particle size is smaller than 0.01 μm, the hydrophobiczeolite aggregates easily with a tendency to reduce dispersibility in aresin. If the average particle size is larger than 10 μm, it tends to bedifficult to add a large amount of the hydrophobic zeolite because filmformability tends to be poor. Furthermore, the possibility arises that asufficient odor-eliminating effect is not obtained, because the surfacearea is also decreased.

The hydrophobic zeolite, which is hydrophobic, has the difficulty inadsorbing highly polar water molecules or the like, but has highaffinity for low polar odor molecules, hydrophobic gases, and lipophilicgases (including solvent gases) and easily adsorbs them. The zeolitesurface exhibits basicity by the action of an alkali metal and analkaline earth metal, such as Ca, Na, and K, present on the zeolitesurface, and easily adsorbs acidic gases through neutralizationreaction.

[Chemical Adsorbent-Supported Inorganic Porous Material]

In the present invention, the chemical adsorbent-supported inorganicporous material is an inorganic porous material on which a chemicaladsorbent is supported, and has the function of adsorbing elutableorganic matter, or odor substances generated from packages duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

A supporting method known in the art or commonly used can be applied toa supporting method. For example, the inorganic porous material can beimpregnated with a solution containing the chemical adsorbent describedbelow, and dried for supporting.

In the present invention, the containment of the odor adsorbent materialcontaining the chemical adsorbent-supported inorganic porous material inan odor-adsorbing layer can drastically enhance adsorbing ability perunit mass of the chemical adsorbent and can decrease the content of thechemical adsorbent-supported inorganic porous material in theodor-adsorbing layer. Furthermore, the physical adsorptioncharacteristics of the pore portion of the inorganic porous material canalso be expected.

Owing to such a decreased content, the resin composition containing thechemical adsorbent-supported inorganic porous material can retainexcellent film formability, adhesiveness, sealing strength, etc.

The chemical adsorbent-supported inorganic porous material can have anarbitrary outer shape such as a spherical, rod-like, or elliptic shapeand may be in any form such as a powder, a mass, or particles. The formof a powder is preferred from the viewpoint of the film formability ofthe odor-adsorbing layer, uniform dispersion in a thermoplastic resin,kneading characteristics, etc.

The chemical adsorbent-supported inorganic porous material can beappropriately selected so as to have an arbitrary average particle sizeaccording to a purpose. In the present invention, the average particlesize is particularly preferably 0.01 μm to 10 μm, more preferably 0.1 μmto 8 μm, further preferably 1 μm to 7 μm. In this context, the averageparticle size is a value measured by a dynamic light scattering method.

If the average particle size is smaller than 0.01 μm, the chemicaladsorbent-supported inorganic porous material aggregates easily with atendency to reduce the dispersibility of the chemicaladsorbent-supported inorganic porous material in a resin.

If the average particle size is larger than 10 μm, it tends to bedifficult to add a large amount of the chemical adsorbent-supportedinorganic porous material because the resin composition containing thechemical adsorbent-supported inorganic porous material easily has poorfilm formability. The possibility arises that a sufficient adsorbingeffect is not obtained.

(Inorganic Porous Material)

In the present invention, an arbitrary inorganic compound having manypores on its surface can be used as the inorganic porous material.Examples thereof include zeolite, silicon dioxide, silicate, activatedcarbon, titania, inorganic phosphate such as calcium phosphate, alumina,aluminum hydroxide, magnesium hydroxide, and mixtures thereof.

Particularly, aluminum hydroxide, zeolite, or silicate is preferablyutilized from the viewpoint of a porous state with a pore size effectivefor the molecular size or cluster size of a substance to be adsorbed,and safety.

The inorganic porous material can have an arbitrary outer shape such asa spherical, rod-like, or elliptic shape and may be in any form such asa powder, a mass, or particles. The form of a powder is preferred fromthe viewpoint of uniform dispersion in a resin after preparation of thechemical adsorbent-supported inorganic porous material by the supportingof the chemical adsorbent, kneading characteristics, the filmformability of the resin composition containing the chemicaladsorbent-supported inorganic porous material, etc.

The inorganic porous material can be appropriately selected so as tohave an arbitrary average particle size according to a purpose. In thepresent invention, the average particle size is particularly preferably0.01 μm to 10 μm, more preferably 0.1 μm to 8 μm, further preferably 1μm to 7 μm, for obtaining the chemical adsorbent-supported inorganicporous material having the average particle size described above.

(Chemical Adsorbent)

The chemical adsorbent is the same as in the object 1.

<Base Material Layer>

A film or a sheet, such as a resin film or sheet, synthetic paper, or apaper base material, which is generally used in packaging materials forpackaging bags can be used as the base material layer contained in theodor-adsorbing laminate of the present invention. A film or a sheetexcellent in mechanical strength such as tensile strength, flexuralstrength, and impact strength and also excellent in printability ispreferred.

The base material layer may be constituted by one layer or by two ormore layers. The two or more layers may be layers having the samecomposition or may be layers differing in composition.

A Monoaxially or Biaxially Drawn Resin Film or Sheet is Preferred.

Specific examples of the resin include: polyester resins such aspolyethylene terephthalate (PET), polybutylene terephthalate (PBT), andpolyethylene naphthalate; polyamide resins such as nylon 6, nylon 66,and MXD6 (poly-m-xylylene adipamide); cellophane; polyolefin resins suchas polyethylene resins, polypropylene resins, and acid-modifiedpolyolefin resins; polystyrene resins; polyurethane resins; acetalresins; and EVOH.

In the case of using the odor-adsorbing laminate of the presentinvention as a packaging material, a suitable resin can be freelyselected for use according to the type of contents to be packaged anduse conditions such as the presence or absence of heating treatmentafter packing. Among those described above, a polyester resin or apolyamide resin is preferred.

Particularly, a monoaxially or biaxially drawn polyethyleneterephthalate film or sheet or a biaxially drawn polypropylene film orsheet, etc. is suitable.

The resin film or sheet for use in the base material layer can besupplemented, if necessary, with, for example, plastic compoundingagents or additives such as a lubricant, a cross-linking agent, anantioxidant, an ultraviolet absorber, a light stabilizer, a filler, areinforcing agent, an antistatic agent, and a pigment for the purpose ofimproving or modifying processability, heat resistance, weatherresistance, mechanical properties, dimensional stability, antioxidativeproperties, lubricity, mold release properties, flame retardancy,antimycotic properties, electric characteristics, strength, etc. Theamount of these agents added can be an arbitrary amount according to apurpose without having an adverse effect on different performance.

Specifically, for example, a hard sized bleached or unbleached paperbase material, or pure white roll paper, kraft paper, paper board,coated paper, cast coated paper, processed paper, or high-quality papercan be used as the paper base material.

A paper base material having a basis weight of approximately 80 to 600g/m², preferably a basis weight of approximately 100 to 450 g/m², can beused.

A metal or a metal oxide may be vapor-deposited on the resin film orsheet for use in the base material layer.

The base material layer and the film or the sheet constituting the basematerial layer may be subjected in advance to physical treatment such ascorona discharge treatment, ozone treatment, low-temperature plasmatreatment using oxygen gas or nitrogen gas, or glow discharge treatment,or chemical treatment such as oxidation treatment using a chemicalagent, before lamination in order to improve adhesion properties.

Alternatively, various coating agent layers such as a primer coatingagent layer, an undercoating agent layer, an anchor coating agent layer,an adhesive layer, and a vapor-deposited anchor coating agent layer maybe arbitrarily formed on the surface of the thermoplastic resin layer toprepare a surface-treated layer.

For example, a resin composition composed mainly of a vehicle such as apolyester resin, a polyamide resin, a polyurethane resin, an epoxyresin, a phenol resin, a (meth)acrylic resin, a polyvinyl acetate resin,a polyolefin resin such as polyethylene or polypropylene or a copolymeror modified resin thereof, or a cellulose resin can be used in variouscoating agent layers described above.

The thickness of the base material layer is preferably 10 μm or largerand 50 μm or smaller, more preferably 15 μm or larger and 40 μm orsmaller.

If the thickness is smaller than the range described above, it tends tobe difficult to exert high bag drop strength due to too low rigidity ofthe laminate. If the thickness is larger than the range described above,too high rigidity of the laminate facilitates difficult processing ofthe laminate and also facilitates worsening content packing properties.

<Adhesion Layer>

In the odor-adsorbing laminate of the present invention, an adhesionlayer may be provided between layers such as the base material layer,the sealant layer, and other layers, and between layers in each layerhaving a multilayered configuration, for lamination.

<Adhesion Layer Containing Odor Adsorbent Material>

The adhesion layer can contain an odor adsorbent material.

The adhesion layer can further contain an adhesive suitable for use incombination with the odor adsorbent material. Furthermore, the adhesionlayer can comprise an odor-adsorbing adhesion layer containing an odoradsorbent material and an adhesive, and a non-odor-adsorbing adhesionlayer containing no odor adsorbent material but having an adhesive. Thenon-odor-adsorbing adhesion layer is preferably in contact with one sideor both sides of the odor-adsorbing adhesion layer.

The content of the odor adsorbent material in the adhesion layer ispreferably 0.3% by mass or more and 50% by mass or less.

The content of the hydrophobic zeolite in the adhesion layer can be atleast 0.05% by mass of the hydrophobic zeolite contained in the wholeadhesion layer, for exerting a sufficient odor-adsorbing effect, and ismore preferably 0.3% by mass or more for obtaining a favorableodor-adsorbing effect as a package. On the other hand, the content ofthe hydrophobic zeolite is preferably 50% by mass or less for obtainingfavorable film formability at the time of laminate preparation and, inaddition, for achieving favorable adhesiveness.

The content of the chemical adsorbent-supported inorganic porousmaterial in the adhesion layer can be at least 0.05% by mass of thechemical adsorbent-supported inorganic porous material contained in thewhole adhesion layer, for exerting a sufficient adsorbing effect, and ispreferably 0.3% by mass or more for obtaining a favorable adsorbingeffect as a package.

On the other hand, the content of the chemical adsorbent-supportedinorganic porous material in the whole adhesion layer is preferably 10%by mass or less for obtaining favorable film formability at the time oflaminate preparation and, in addition, for achieving favorableadhesiveness.

The adhesion layer can be a layer formed by various systems such as EC(extrusion coating), dry lamination, non-solvent lamination, and sandlamination.

When the adhesion layer is a dry lamination adhesion layer or anon-solvent lamination adhesion layer, the contents of the odoradsorbent material, the hydrophobic zeolite, and the chemicaladsorbent-supported inorganic porous material are preferably in theranges described above.

When the adhesion layer is an EC (extrusion coating) adhesion layer or asand lamination adhesion layer, the content of the odor adsorbentmaterial is preferably 0.3% by mass or more and 15% by mass or less forthe same reason as above. The content of the hydrophobic zeolite ispreferably 0.3% by mass or more and 15% by mass or less. The content ofthe chemical adsorbent-supported inorganic porous material is preferably0.3% by mass or more and 10% by mass or less. In the case of comprisinghydrophobic zeolite and a chemical adsorbent-supported inorganic porousmaterial, the content of the hydrophobic zeolite is preferably 0.3% bymass or more and 13% by mass or less, and the content of the chemicaladsorbent-supported inorganic porous material is preferably 0.3% by massor more and 10% by mass or less.

Although the method for forming the adhesion layer by extrusion coatingor sand lamination is not particularly limited, first, a resincomposition for forming the adhesion layer is melted by heating,expanded and extended in a necessary width direction using a T-die, andextruded into a curtain-like form. The melted product is allowed to flowdown onto a layer to be adhesively bonded, which is then sandwichedbetween a rubber roll and a cooled metal roll to perform the formationof the adhesion layer and its adhesive bonding and lamination to thelayer to be adhesively bonded at the same time.

In the case of forming the adhesion layer by dry lamination, the resincomposition dispersed or dissolved in a solvent is applied onto one ofthe layers and dried, and the other layer to be adhesively bonded isoverlaid and laminated thereto. Then, the resin composition is cured byaging at 30 to 120° C. for several hours to several days for lamination.

Examples of the application method described above include roll coating,gravure roll coating, and kiss coating. The amount of coating isdesirably on the order of 0.1 to 10 g/m² (dry state). When the amount ofcoating with the resin composition falls within the range describedabove, favorable adhesiveness is obtained.

In the case of forming the adhesion layer by non-solvent lamination, thesolvent-free resin composition is applied onto one of the layers, andthe other layer to be adhesively bonded is overlaid and laminatedthereto. Then, the resin composition is cured by aging at 30 to 120° C.for several hours to several days for lamination.

Examples of the application method described above include roll coating,gravure roll coating, and kiss coating. The amount of coating isdesirably on the order of 0.1 to 15 g/m². When the amount of coatingwith the resin composition falls within the range described above,favorable adhesiveness is obtained.

[Adhesive Suitable for Use in Combination with Odor Adsorbent Material]

The adhesive suitable for use in combination with the odor adsorbentmaterial can be of thermosetting type, ultraviolet cure type, electronbeam cure type, or the like and may be in any form such as an aqueous,solution, emulsion, or dispersed form. Its nature is in any form such asa film or sheet, a powder, or a solid. The adhesion mechanism may be inany form such as chemical reaction, solvent volatilization, heatmelting, or thermal compression.

Specific examples of the adhesive include polyvinyl acetate adhesivessuch as polyvinyl acetate and vinyl acetate-ethylene copolymers,polyacrylic acid adhesives consisting of a copolymer of polyacrylic acidwith polystyrene, polyester, polyvinyl acetate, or the like, cyanoacrylate adhesives, ethylene copolymer adhesives consisting of acopolymer of ethylene with a monomer such as vinyl acetate, ethylacrylate, acrylic acid, or methacrylic acid, cellulose adhesives,polyurethane adhesives, polyester adhesives, polyamide adhesives,polyimide adhesives, polyolefin adhesives such as LDPE, amino resinadhesives consisting of urea resin or melamine resin, phenol resinadhesives, epoxy adhesives, reactive (meth)acrylic adhesives, elastomeradhesives consisting of chloroprene rubber, nitrile rubber,styrene-butadiene rubber, or the like, silicone adhesives, and inorganicadhesives consisting of alkali metal silicate, low-melting glass, or thelike, and further, anchor coating agents.

For example, an organotitanium, isocyanate, polyethylenimine,acid-modified polyethylene, or polybutadiene anchor coating agent can beused as the anchor coating agent.

The adhesive is preferably one or two or more members selected from thegroup consisting of a polyurethane resin, a polyester resin, a polyamideresin, and a polyolefin resin among them.

<Sealant Layer>

The sealant layer is a layer that imparts heat sealing properties andfunctions such as flex resistance and impact resistance to the laminate.

The sealant layer may be constituted by one layer or by two or morelayers. The two or more layers may be layers having the same compositionor may be layers differing in composition.

The sealant layer of the odor adsorbent material of the presentinvention preferably contains thermoplastic resin C.

The sealant layer can further comprise an odor-adsorbing sealant layerand a non-odor-adsorbing sealant layer. The non-odor-adsorbing sealantlayer is preferably in contact with one side or both sides of theodor-adsorbing sealant layer.

The content of the odor adsorbent material in the whole sealant layer ispreferably 0.3% by mass or more and 15% by mass or less.

The content of the hydrophobic zeolite in the whole sealant layer can beat least 0.05% by mass of the hydrophobic zeolite contained in the wholesealant layer, for exerting a sufficient odor-adsorbing effect, and ispreferably 0.1% by mass or more, more preferably 0.25% by mass or more,for obtaining a favorable odor-adsorbing effect as a package. On theother hand, the content of the hydrophobic zeolite is preferably 13% bymass or less, more preferably 10% by mass or less, for obtainingfavorable film formability at the time of laminate preparation and, inaddition, for achieving favorable heat sealing properties.

The content of the chemical adsorbent-supported inorganic porousmaterial in the whole sealant layer can be at least 0.05% by mass of thechemical adsorbent-supported inorganic porous material contained in thewhole sealant layer, for exerting a sufficient adsorbing effect, and ispreferably 0.1% by mass or more, more preferably 0.25% by mass or more,for obtaining a favorable adsorbing effect as a package.

On the other hand, the content of the chemical adsorbent-supportedinorganic porous material in the whole sealant layer is preferably 10%by mass or less, more preferably 9% by mass or less, for obtainingfavorable film formability at the time of laminate preparation and, inaddition, for achieving favorable heat sealing properties.

The thickness of the sealant layer is preferably 5 to 500 μm, morepreferably 10 to 250 μm. A thickness smaller than the range describedabove facilitates difficult obtainment of sufficient heat sealingstrength. A thickness larger than the range described above incurselevation of cost and tends to facilitate hardening a film and worseningworkability.

[Thermoplastic Resin C]

In the present invention, the thermoplastic resin C is a resin that maybe used in the sealant layer and has heat sealing properties. Its meltflow rate is preferably 0.2 g/10 min or more and 10.0 g/10 min or less,more preferably 0.2 g/10 min or more and 9.5 g/10 min or less. In thepresent specification, MFR is a value measured by an approach conformingto JIS K 7210.

If MFR is less than 0.2 g/min or more than 10 g/min, processingsuitability is less effective.

Specific examples of the thermoplastic resin C include, but are notlimited to, polyethylene, low-density polyethylene, medium-densitypolyethylene, high-density polyethylene, linear low-densitypolyethylene, metallocene polyethylene, polypropylene, ethylene-vinylacetate copolymers, ionomer resins, ethylene-ethyl (meth)acrylatecopolymers, ethylene-(meth)acrylic acid copolymers, ethylene-propylenecopolymers, methylpentene polymers, polyolefin resins such aspolyethylene and polypropylene, modified polyolefin resins obtained bymodifying the polyolefin resins with unsaturated carboxylic acid such asacrylic acid, methacrylic acid, maleic anhydride, or fumaric acid,ethylene-(meth)acrylic acid ester-unsaturated carboxylic acid ternarycopolymer resins, cyclic polyolefin resins, cyclic olefin copolymers,polyethylene terephthalate (PET), and polyacrylonitrile (PAN).

Among those described above, a polyolefin resin is preferably containedfrom the viewpoint of heat sealing properties. Particularly, low-densitypolyethylene (LDPE) or linear low-density polyethylene (LLDPE) ispreferably contained, and LLDPE is particularly preferably contained.

The thermoplastic resin C may comprise a small amount of an additivesuch as an antioxidant or an antiblocking agent and may be supplemented,if necessary, with a flex resistance improving agent, an inorganic ororganic additive, or the like known in the art.

Furthermore, the thermoplastic resin C is preferably excellent inresistance to pinholes attributed to flexion when singly prepared into afilm.

Pinhole resistance is important, particularly, for packaging materialsfor foods or medical products, etc. because fatigue failure progressesin packages due to local repeated flexion ascribable to vibration duringa packaging step or during transport so that pinholes are formed.

As for the pinhole resistance of the thermoplastic resin C according tothe present invention, for example, the number of pinholes formed after5000 Gelbo flexes at 23° C. in a 50 μm thick film consisting of lowelutable polyethylene singly is preferably 0 or 1 or more and 160 orless.

When the number of pinholes formed in the sealant film falls within therange described above, a packaging material workable for an applicationrequiring pinhole resistance can be prepared.

[Odor-Adsorbing Sealant Layer]

The odor-adsorbing sealant layer according to the present invention is alayer formed from a resin composition comprising thermoplastic resin Cand an odor adsorbent material.

In one embodiment of the present invention, the odor-adsorbing sealantlayer has a single-layered configuration formed using a resincomposition obtained by kneading the odor adsorbent material and thethermoplastic resin C. In this context, the odor adsorbent material maybe uniformly dispersed in the layer or may be dispersed with aconcentration gradient.

For example, the odor adsorbent material may be dispersed with aconcentration gradient on the increase from the inner surface toward theouter surface at the time of package formation. This configurationimproves heat sealing properties. In contrast to this, the odoradsorbent material may be dispersed with a concentration gradient on thedecrease from the inner surface toward the outer surface at the time ofpackage formation. This configuration improves interlayer adhesionstrength.

Alternatively, the odor adsorbent material may be dispersed with aconcentration gradient on the decrease from the central portion in thethickness direction of the odor-adsorbing sealant layer toward bothsurfaces. This configuration improves heat sealing properties andinterlayer adhesion strength.

In another embodiment, the odor-adsorbing sealant layer may have amultilayered configuration in which two or more layers are laminated. Inthis context, these layers may comprise resin compositions differing inthe type of the thermoplastic resin C or the type or content of the odoradsorbent material.

An additional component may be further contained without inhibitingodor-adsorbing properties or heat sealing properties.

The total layer thickness of the odor-adsorbing sealant layer can be atleast 5 μm for film formation and is preferably 10 μm to 200 μm forobtaining favorable film formability, heat sealing properties,interlayer adhesion strength and odor-adsorbing properties.

[Non-Odor-Adsorbing Sealant Layer]

The non-odor-adsorbing sealant layer according to the present inventionis a layer containing thermoplastic resin C and containing no odoradsorbent material.

The non-odor-adsorbing sealant layer containing no odor adsorbentmaterial is superior in heat sealing properties to the odor-adsorbingsealant layer containing the odor adsorbent material. Because of thisproperty, the non-odor-adsorbing sealant layer is preferably laminatedon one side or both sides of the odor-adsorbing sealant layer. Thislamination configuration enables the odor-adsorbing sealant layer to beadhesively bonded firmly in a laminate and enables laminates to beheat-sealed firmly.

(Film Formation and Lamination Methods for Sealant Layer)

In the present invention, the film formation and lamination methods forthe sealant layer are not particularly limited, and a film formationmethod and a lamination method known in the art or commonly used can beapplied thereto. The sealant layer can be formed by, for example, aninflation method, a casting method, or an extrusion method (or acoextrusion method).

The sealant layer film-formed in advance may be laminated on themultiple layers via an adhesion layer by dry lamination, non-solventlamination, sand lamination, or the like.

Alternatively, on the multiple layers, an extrusion method is used for amultilayered configuration. A resin composition forming the sealantlayer is melted by heating, expanded and extended in a necessary widthdirection using a T-die, and extruded into a curtain-like form. Themelted resin is allowed to flow down onto a surface to be laminated,which is then sandwiched between a rubber roll and a cooled metal rollto perform the formation of the sealant layer and its adhesive bondingand lamination to the surface to be laminated at the same time. Theadhesive bonding may be performed via an adhesive layer, if necessary.

In this context, in any of the film formation and lamination methodsdescribed above, the sealant layer may be constituted by a plurality ofodor-adsorbing sealant layers or non-odor-adsorbing sealant layers, andthese layers may be adhesively bonded via an adhesive.

<Odor-Adsorbing Film for Packaging Material>

The odor-adsorbing laminate of the present invention can be used as anodor-adsorbing film for a packaging material.

<Odor-Adsorbing Packaging Material>

The odor-adsorbing film for a packaging material of the presentinvention can be used to prepare an odor-adsorbing packaging material.

In order to prepare a packaging bag using the odor-adsorbing packagingmaterial of the present invention, the packaging bag can be prepared,for example, by bending the packaging material or overlaying two suchpackaging materials such that faces having favorable heat sealingproperties are opposed to each other, and heat-sealing peripheral edgesin a heat-seal form, for example, lateral seal type, two-sided sealtype, three-sided seal type, four-sided seal type, envelope-like sealtype, center seal type (pillow seal type), pleated seal type, flatbottom seal type, square bottom seal type, or a gazette type.

A method known in the art, for example, bar sealing, rotating rollsealing, belt sealing, impulse sealing, high-frequency sealing, orultrasonic sealing can be applied to a heat sealing method.

<Odor-Adsorbing Packaging Material for BIB>

The odor-adsorbing packaging material of the present invention can beused as an odor-adsorbing packaging material for BIB.

The odor-adsorbing packaging material of the present invention can beused as an odor-adsorbing liquid content packaging material for BIB,particularly, intended for liquid contents.

In the present invention, examples of the liquid contents can includegeneral liquids such as drinking water, juices, drip infusions,seasoning liquids such as soy sauce and sauce, soups, honey, baste, anddressing.

Object 4

<Package and Liquid Content Package for BIB>

The package of the present invention is constituted by, for example, asshown in FIG. 16, at least a double-bag portion and a content spoutcomprising a resin molded article.

The double-bag portion is constituted by, as shown in FIG. 17, an upperfilm and a lower film, and the content spout is installed in the upperfilm.

Each of the upper film and the lower film comprises, as shown in FIG. 18or 19, at least an outer layer film and an inner layer film. The outerlayer film and the inner layer film are adhesively bonded only partiallyto each other.

The adhesively bonded portion between the outer layer film and the innerlayer film is preferably located at least at the periphery of thepackage and is in a lattice shape composed of continuous lines, in ashape composed of discontinuous lines, or in a dot shape.

The package of the present invention is used as, for example, a liquidcontent package for BIB and subjected to the packing of contents in ahermetically sealed state with its content spout capped. Specifically,the hermetically sealed liquid content package for BIB, when used for anordinary purpose, is placed in a cardboard box and supplied to a user.The hermetically sealed liquid content package for BIB, when used inaseptic packaging, is disinfected with an electron beam, a γ ray,ethylene oxide gas, or the like and then supplied to a user.

For the package of the present invention, pinhole resistance isimportant, particularly, for packaging materials for foods or medicalproducts, etc. because fatigue failure progresses due to local repeatedflexion ascribable to vibration during a packaging step or duringtransport, or due to the contact of a content spout so that pinholes,which cause leakage of liquid contents in liquid content packages forBIB used, are formed.

[Method for Preparing Package]

The package of the present invention can be prepared, for example, asshown in FIG. 17, by bending a packaging material or overlaying twopackaging materials such that the sealant layer of the contentspout-installed upper film and the sealant layer of the lower film areopposed to each other, and heat-sealing peripheral edges in a heat-sealform, for example, lateral seal type, two-sided seal type, three-sidedseal type, four-sided seal type, envelope-like seal type, center sealtype (pillow seal type), pleated seal type, flat bottom seal type,square bottom seal type, or a gazette type.

A method known in the art, for example, bar sealing, rotating rollsealing, belt sealing, impulse sealing, high-frequency sealing, orultrasonic sealing can be applied to a heat sealing method.

The method for installing the content spout in the upper film involvesmaking a hole at a content spout installation position of the upperfilm, inserting the content spout to the hole from the inner side of theupper film, fixing the inner face of the upper film to the outer side ofa flange of the content spout by heat sealing, and further capping thecontent spout to create a hermetically sealed state.

<Content Spout>

The content spout is an entrance and/or exit port through which contentsare packed and/or taken out. The contents may be packed into and takenout of one content spout, or two or more content spouts may be providedand the contents can be packed into and taken out of the separatecontent spouts.

The content spout is not particularly limited by its installationposition and is preferably installed at or near any of four sides of thepackage.

The content spout preferably contains a polyolefin resin.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers, polypropylene resins, cyclic polyolefin resins,methylpentene polymers, and acid-modified polyolefin resins.

The melt flow rate of the polyolefin resin is preferably 5 g/min or moreand 100 g/min or less from the viewpoint of moldability.

The content spout can also be supplemented with various plasticcompounding agents, additives, or the like for the purpose of improvingor modifying processability, heat resistance, weather resistance,mechanical properties, dimensional stability, antioxidative properties,lubricity, mold release properties, flame retardancy, antimycoticproperties, electric characteristics, strength, etc.

The content spout can be obtained by mixing and kneading various rawmaterials described above by a method known in the art to prepare aresin composition, and molding the resin composition by a method knownin the art.

The resin contained in the content spout is preferably the polyolefinresin described above, though the resin is not limited thereto. Variousthermoplastic resins can be contained without having an adverse effect.

The melt flow rate of the thermoplastic resin contained therein ispreferably 5 g/min or more and 100 g/min or less from the viewpoint ofmoldability.

<Layer Configurations of Outer Layer Film and Inner Layer Film>

Each of the upper film and the lower film constituting the double-bagportion of the liquid content package for BIB of the present inventioncomprises, as shown in FIG. 18 or 19, at least an outer layer film andan inner layer film. The outer layer film and the inner layer film areadhesively bonded only partially to each other.

Each of the outer layer film and the inner layer film is a film havingat least a sealant layer containing low elutable polyethylene.

The sealant layer of the inner layer film comprises an odor-adsorbinglayer.

The sealant layer of the inner layer film may be a layer consisting ofthe odor-adsorbing layer as shown in FIG. 20, or may have a multilayeredstructure with a non-odor-adsorbing layer containing low elutablepolyethylene but containing no odor adsorbent material, in order toimprove sealing strength and interlayer adhesion strength, as shown inFIG. 21 or 22.

As shown in FIG. 23, the odor-adsorbing layer may have a multilayeredstructure having the same or different types of low elutablepolyethylene as a main component or the same or different types orcontents of the odor adsorbent material.

In the package of the present invention, an innermost layer, which comesinto contact with contents, may be an odor-adsorbing layer or may be anon-odor-adsorbing layer. The non-odor-adsorbing layer serving as aninnermost layer can improve the sealing strength of the package. Theodor-adsorbing layer serving as an innermost layer can improveinterlayer adhesion strength within the package.

Each of the outer layer film and the inner layer film can also comprise,as shown in FIG. 24, a base material layer, a functional layer such as areinforcing layer, an adhesion layer, or the like in order to improvethe strength of the film or impart various functions thereto.

Particularly, the outer layer film preferably comprises a base materiallayer. A layer known in the art can be laminated for use as the basematerial layer, the functional layer, or the adhesion layer by a methodknown in the art.

<Sealant Layers of Outer Layer Film and Inner Layer Film>

The sealant layer of the inner layer film comprises an odor-adsorbinglayer and may further comprise a non-odor-adsorbing layer.

The sealant layer of the outer layer film comprises only anon-odor-adsorbing layer and comprises no odor-adsorbing layer.

[Odor-Adsorbing Layer]

The odor-adsorbing layer according to the present invention comprise aresin composition comprising low elutable polyethylene and an odoradsorbent material.

The resin composition may further comprise general-purpose polyethylene,polypropylene, a methylpentene polymer, an acid-modified polyolefinresin, and a mixture of these thermoplastic resins, etc., withoutinhibiting the low eluting properties or heat sealing properties of thesealant film, though the resin is not limited thereto.

In one embodiment of the present invention, the odor-adsorbing layer hasa single-layered configuration formed using a resin composition obtainedby kneading the odor adsorbent material and the low elutablepolyethylene. In this context, the odor adsorbent material may beuniformly dispersed in the layer or may be dispersed with aconcentration gradient.

For example, the odor adsorbent material may be dispersed with aconcentration gradient on the increase from the inner surface toward theouter surface at the time of package formation. This configurationimproves heat sealing properties. In contrast to this, the odoradsorbent material may be dispersed with a concentration gradient on thedecrease from the inner surface toward the outer surface at the time ofpackage formation. This configuration improves interlayer adhesionstrength.

Alternatively, the odor adsorbent material may be dispersed with aconcentration gradient on the decrease from the central portion in thethickness direction of the odor-adsorbing layer toward both surfaces.This configuration improves heat sealing properties and interlayeradhesion strength.

In another embodiment, the odor-adsorbing layer may have a multilayeredconfiguration in which two or more layers are laminated. In thiscontext, these layers may comprise resin compositions differing in thetype of the low elutable polyethylene as a main component or the type orcontent of the odor adsorbent material.

The total layer thickness of the odor-adsorbing layer can be at least 5μm for film formation and is preferably 10 μm to 200 μm for obtainingfavorable film formability, heat sealing properties, interlayer adhesionstrength and odor-adsorbing properties.

The odor adsorbent material comprises hydrophobic zeolite and canfurther comprise a chemical adsorbent-supported inorganic porousmaterial.

The hydrophobic zeolite or the chemical adsorbent-supported inorganicporous material may be mixed and kneaded directly with the low elutablepolyethylene. Alternatively, a so-called master batch system may beperformed, which involves mixing the hydrophobic zeolite or the chemicaladsorbent-supported inorganic porous material at a high concentrationwith a thermoplastic resin, then preparing a master batch by meltkneading, and mixing and melt-kneading this master batch with the lowelutable polyethylene at a ratio appropriate for the target contentpercentages.

In the present invention, the amount of the hydrophobic zeolite addedcan be at least 0.05% by mass of the hydrophobic zeolite contained inthe whole sealant layer of the inner layer film, for exerting asufficient odor-adsorbing effect, and is preferably 0.1% by mass ormore, more preferably 0.25% by mass or more, for obtaining a favorableodor-adsorbing effect as a package. On the other hand, the content ofthe hydrophobic zeolite is preferably 13% by mass or less, morepreferably 10% by mass or less, for obtaining favorable film formabilityat the time of laminate preparation and, in addition, for achievingfavorable heat sealing properties.

The content of the chemical adsorbent-supported inorganic porousmaterial can be at least 0.05% by mass of the chemicaladsorbent-supported inorganic porous material contained in the wholesealant layer of the inner layer film, for exerting a sufficientadsorbing effect, and is preferably 0.1% by mass or more, morepreferably 0.25% by mass or more, for obtaining a favorable adsorbingeffect as a package.

On the other hand, the content of the chemical adsorbent-supportedinorganic porous material is preferably 10% by mass or less, morepreferably 9% by mass or less, in the whole sealant layer of the innerlayer film, for obtaining favorable film formability at the time oflaminate preparation and, in addition, for achieving favorable heatsealing properties.

[Low Elutable Polyethylene]

In the present invention, the sealant layer of each of the outer layerfilm and the inner layer film has heat sealing properties and containslow elutable polyethylene attaining a small amount of organic mattereluted.

Such a small amount of organic matter eluted can decrease theconcentration of organic matter eluted into liquid contents packed inthe package of the present invention and suppress change in taste andodor.

In this context, the concentration of the organic matter in liquidcontents is indicated by the concentration of TOC (total organic carbon)in the present invention.

TOC represents the total concentration organic matter (organic carbon)oxidizable in water by the concentration of carbon. TOC is used as atypical water quality index and is standardized by JIS K 0805 (automatictotal organic carbon (TOC) analyzer), etc.

The concentration of elutable TOC contained in a film consisting of thelow elutable polyethylene is 1.5 ppm or higher and 250 ppm or lower.

In this context, the concentration of elutable TOC as to the lowelutable polyethylene as a single raw material is measured in a filmstate, not in a state such as raw material pellets, because the lowelutable polyethylene may increase the amount of TOC eluted by theapplication of various heat histories, etc. during film preparation suchas sealant layer formation.

After packing of 1 kg of distilled water as filling water into a 15cm×44 cm×50 μm thick pouch packaging bag prepared from the low elutablepolyethylene according to the present invention, followed by elution,the increased concentration of TOC in the filling water is preferably0.01 ppm or higher and 1.5 ppm or lower, more preferably 0.02 ppm orhigher and 1.45 ppm or lower, further preferably 0.025 ppm or higher and1.4 ppm or lower.

If the increased concentration of TOC in the filling water is largerthan 1.5 ppm, it is difficult to suppress change in taste and odor ofthe filling water. In order to obtain this concentration of smaller than0.01 ppm, effects are limited though cost is high. The range describedabove is preferred from the viewpoint of the balance between cost andperformance.

In order to specifically determine the increased concentration of TOC,for example, 1000 g of distilled water of 40° C. to 80° C. is packed asfilling water into the pouch packaging bag described above, which isthen stored at 25° C. to 50° C. for several days to 4 weeks. Then, theTOC concentration of the filling water is measured using a total organiccarbon meter or HS-GC. The TOC concentration of the distilled water as ablank can be subtracted therefrom to determine the increasedconcentration of TOC.

In the present invention, the increased concentration of TOC isdetermined by a standard method which involves preparing a package of apouch bag (15 cm×44 cm) using the packaging material for a package, theouter layer film, and the inner layer film, packing thereinto 1000 g ofwater (distilled water for high-performance liquid chromatography,Junsei Chemical Co., Ltd.) of 65° C. to prepare a liquid-packed package,which is then stored at 35° C. for 2 weeks, and then measuring the TOCconcentration of the filling water using TOC-L total organic carbonmeter manufactured by Shimadzu Corp.

Then, the concentration of elutable TOC contained in the sealant film iscalculated from the obtained increased TOC concentration of the fillingwater, parts by mass of the filling water, and parts by mass of thesealant film.

Specific examples of the low elutable polyethylene include low-elutionresins such as low-density polyethylene (LDPE), medium-densitypolyethylene (MDPE), high-density polyethylene (HDPE), linearlow-density polyethylene (LLDPE), ethylene-vinyl acetate copolymers,ethylene-ethyl acrylate copolymers, ethylene-acrylic acid copolymers,ethylene-methacrylic acid copolymers, ethylene-methyl methacrylatecopolymers, and ethylene-propylene copolymers, and mixtures of theseresins, though the low elutable polyethylene is not limited to theseresins.

Examples of the method for decreasing the amount of organic mattereluted from a low elutable polyethylene film include, but are notlimited to, the following methods.

Decrease in residual amounts of unreacted raw materials or amounts oflow-molecular-weight products or by-products, or the removal of apolymerization catalyst in the production of the polyethylene iseffective. A specific method involves improving a raw material purity,precisely controlling conditions such as a reaction temperature or apressure, removing unreacted raw materials, low-molecular-weightproducts, by-products or a polymerization catalyst by distillation orwashing, or preventing oxidation ascribable to contact with oxygen inair at a high temperature.

For the pelletization of the produced polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, and other additiveswhich may elevate the amount of organic matter eluted.

For the film preparation of the polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, a solvent, and otheradditives which may elevate the amount of organic matter eluted, orpreventing oxidation ascribable to a high temperature.

In the present invention, the sealant layer has heat sealing propertiesand contains low elutable polyethylene. Thus, a packaging materialcomprising the sealant film has excellent heat sealing properties,attains a small amount of organic matter eluted, and can reduce increasein TOC concentration in liquid contents in the package.

The polyethylene is suitable because of its properties of beingresistant to sterilization/disinfection treatment such as UV and beingless decomposable.

Among these low elutable polyethylenes, the type is preferably LLDPE.Since LLDPE having a C4, C6, or C8 side chain tends to be capable ofdecreasing the amount of organic matter eluted, C4-LLDPE, C6-LLDPE,C8-LLDPE, or the like is more preferred.

In this context, C4, C6, or C8 means that a monomer having the describednumerical value as the number of carbon atoms is present at a side chainby partial copolymerization with LLDPE. For example, C4 represents aside chain having a butene-1 structure; C6 represents a side chainhaving a hexene-1 or 4-methylpentene-1 structure; and C8 represents aside chain having an octene-1 structure.

Alternatively, low elutable polyethylene having a density of 0.90 g/cm³or larger and 0.94 g/cm³ or smaller is preferred, and low elutablepolyethylene having a density of 0.905 g/cm³ or larger and 0.933 g/cm³or smaller is more preferred. The low elutable polyethylene having adensity within this range tends to be capable of decreasing the amountof organic matter eluted.

The low elutable polyethylene may contain a small amount of an additivesuch as an antioxidant or an antiblocking agent.

The low elutable polyethylene according to the present invention ispreferably excellent in resistance to pinholes attributed to flexionwhen singly prepared into a film.

As for the pinhole resistance of the low elutable polyethylene accordingto the present invention, for example, the number of pinholes formedafter 5000 Gelbo flexes at 23° C. in a 50 μm thick film consisting ofthe low elutable polyethylene singly is preferably 0 or 1 or more and160 or less.

When the number of pinholes formed in the sealant layer falls within therange described above, a packaging material workable for an applicationrequiring pinhole resistance can be prepared.

[Odor Adsorbent Material]

In the present invention, the odor adsorbent material comprises specifichydrophobic zeolite and can further comprise a chemicaladsorbent-supported inorganic porous material.

(Hydrophobic Zeolite)

Zeolite having a higher SiO₂/Al₂O₃ molar ratio generally has higherhydrophobicity. In the present invention, the hydrophobic zeolitecontained in the odor-adsorbing layer preferably has a SiO₂/Al₂O₃ molarratio of 30/1 to 8000/1.

The hydrophobic zeolite can exert an odor-eliminating effect by theadsorption of odor components without losing the ability to adsorb odoreven when a package or a packaging material is exposed to 230° C. orhigher.

The hydrophobic zeolite can have an arbitrary outer shape such as aspherical, rod-like, or elliptic shape and may be in any form such as apowder, a mass, or particles. The form of a powder is preferred from theviewpoint of the film formability of the odor-adsorbing layer, uniformdispersion in polyethylene, kneading characteristics, etc.

In the present invention, the average particle size of the hydrophobiczeolite can be appropriately selected as an arbitrary average particlesize and is preferably an average particle size of 0.01 μm to 10 μm. Inthis context, the average particle size is a value measured by a dynamiclight scattering method.

If the average particle size is smaller than 0.01 μm, the hydrophobiczeolite aggregates easily with a tendency to reduce dispersibility inthe low elutable polyethylene. If the average particle size is largerthan 10 μm, it tends to be difficult to add a large amount of thehydrophobic zeolite because the odor-adsorbing layer tends to have poorfilm formability. Furthermore, the possibility arises that a sufficientodor-eliminating effect is not obtained, because the surface area isalso decreased.

The hydrophobic zeolite, which is hydrophobic, has the difficulty inadsorbing highly polar water molecules or the like, but has highaffinity for low polar odor molecules, hydrophobic gases, and lipophilicgases (including solvent gases) and easily adsorbs them. The zeolitesurface exhibits basicity by the action of an alkali metal and analkaline earth metal, such as Ca, Na, and K, present on the zeolitesurface, and easily adsorbs acidic gases through neutralizationreaction.

(Chemical Adsorbent-Supported Inorganic Porous Material)

In the present invention, the chemical adsorbent-supported inorganicporous material is an inorganic porous material on which a chemicaladsorbent is supported, and has the function of adsorbing elutableorganic matter, or odor substances generated from packages duringdisinfection/sterilization treatment such as UV irradiation, γ rayirradiation, EB irradiation, hot packing, or boiling.

A supporting method known in the art or commonly used can be applied toa supporting method. For example, the inorganic porous material can beimpregnated with a solution containing the chemical adsorbent describedbelow, and dried for supporting.

In the present invention, the containment of the odor adsorbent materialcontaining the chemical adsorbent-supported inorganic porous material inan odor-adsorbing layer can drastically enhance adsorbing ability perunit mass of the chemical adsorbent and can decrease the content of thechemical adsorbent-supported inorganic porous material in theodor-adsorbing layer. Furthermore, the physical adsorptioncharacteristics of the pore portion of the inorganic porous material canalso be expected.

Owing to such a decreased content, the sealant film acquires highsealing strength and can retain excellent heat sealing properties andfilm formability required for sealant layers.

The chemical adsorbent-supported inorganic porous material can have anarbitrary outer shape such as a spherical, rod-like, or elliptic shapeand may be in any form such as a powder, a mass, or particles. The formof a powder is preferred from the viewpoint of the film formability ofthe odor-adsorbing layer, uniform dispersion in a thermoplastic resin,kneading characteristics, etc.

The chemical adsorbent-supported inorganic porous material can beappropriately selected so as to have an arbitrary average particle sizeaccording to a purpose. In the present invention, the average particlesize is particularly preferably 0.01 μm to 10 μm, more preferably 0.1 μmto 8 μm, further preferably 1 μm to 7 μm. In this context, the averageparticle size is a value measured by a dynamic light scattering method.

If the average particle size is smaller than 0.01 μm, the chemicaladsorbent-supported inorganic porous material aggregates easily with atendency to reduce the dispersibility of the chemicaladsorbent-supported inorganic porous material in the low elutablepolyethylene.

If the average particle size is larger than 10 μm, it tends to bedifficult to add a large amount of the chemical adsorbent-supportedinorganic porous material because the odor-adsorbing layer has poor filmformability. The possibility arises that a sufficient adsorbing effectis not obtained.

(Inorganic Porous Material)

The inorganic porous material is the same as in the object 3.

(Chemical Adsorbent)

In the present invention, the chemical adsorbent is a compound that hasa reactive functional group binding through chemical reaction toelutable organic matter, or an odor substance generated by thedecomposition, etc. of a resin during disinfection/sterilizationtreatment, and can be supported onto the inorganic porous materialdescribed above.

More specifically, the chemical adsorbent is a compound having areactive functional group binding to various aldehydes, ketones,carboxylic acids, and the like resulting from disinfection/sterilizationtreatment such as UV irradiation, γ ray irradiation, EB irradiation, hotpacking, or boiling.

Examples of such a compound include compounds having a basic functionalgroup such as an amino group or a hydroxyl group, metal carbonates,metal bicarbonates, and amide group-containing compounds. Specificexamples of each compound include, but are not limited to, the followingcompounds.

Examples of the compound containing an amino group include alkylamine,ethylenediamine, tetramethylenediamine, diethylenetriamine,triethylenetriamine, tetraethylenepentamine, piperazine,m-phenylenediamine, and polyamine.

Examples of the compound having a hydroxyl group include metalhydroxides such as sodium hydroxide, potassium hydroxide, magnesiumhydroxide, and iron hydroxide.

Examples of the metal carbonate include sodium carbonate and calciumcarbonate.

Examples of the bicarbonate include sodium bicarbonate.

Examples of the amide group-containing compound include2-acrylamido-2-methylpropanesulfonate.

In the present invention, the chemical adsorbent is preferably acompound having an amino group because the compound particularly exertsan excellent adsorbing effect.

The adsorption mechanism of the chemical adsorbent for an elutedsubstance to be adsorbed such as organic matter or an odor substancewill be described in more detail with reference to specific examples ofFIGS. 3(a) to 3(b). However, the present invention is not limited bythese examples.

When the substance to be adsorbed (odor substance) is, for example, anacidic odor substance, as shown in FIG. 3(a), for example, a compoundhaving a hydroxyl group can be selected as the chemical adsorbent andsupported onto the inorganic porous material to prepare a chemicaladsorbent-supported inorganic porous material for use. As a result, thehydroxyl group causes chemical reaction with a carboxyl group so thatthe substance to be adsorbed is adsorbed.

When the substance to be adsorbed is an aldehyde, as shown in FIG. 3(b),for example, a compound having an amino group can be selected as thechemical adsorbent and supported onto the inorganic porous material toprepare a chemical adsorbent-supported inorganic porous material foruse. As a result, the aldehyde group causes chemical reaction with anamino group so that the substance to be adsorbed is adsorbed.

By such chemical adsorption, odor can be efficiently adsorbed withoutdesorbing the substance to be adsorbed (odor substance) once adsorbed.

Unlike a physical adsorbent which adsorbs a substance to be adsorbed(odor substance) and water vapor at the same adsorption site, thechemical adsorbent according to the present invention binds, at itsspecific functional group, to the substance to be adsorbed and istherefore insusceptible to various substances reducing the ability toadsorb odor, for example, water vapor.

<Non-Odor-Adsorbing Layer>

The non-odor-adsorbing layer according to the present invention is alayer containing low elutable polyethylene and containing no odoradsorbent material.

The non-odor-adsorbing layer may further comprise highly elutablepolyethylene, polypropylene, a methylpentene polymer, an acid-modifiedpolyolefin resin, and a mixture of these thermoplastic resins, etc.without inhibiting the low eluting properties or heat sealing propertiesof the sealant film, though the resin is not limited thereto.

<Method for Preparing Inner Layer Film>

(Method for Dispersing Odor Adsorbent Material)

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the low elutablepolyethylene.

The odor adsorbent material may be mixed and kneaded directly with thelow elutable polyethylene. Alternatively, a so-called master batchsystem may be performed, which involves mixing the odor adsorbentmaterial at a high concentration with a thermoplastic resin, thenpreparing a master batch by melt kneading, and mixing and melt-kneadingthis master batch with the low elutable polyethylene at a ratioappropriate for the target content percentages.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the odor adsorbentmaterial into the low elutable polyethylene even if the combination ofthe odor adsorbent material with the low elutable polyethylene, whicheasily causes aggregation, is used.

In this respect, the thermoplastic resin in the master batch may or maynot be the same as the low elutable polyethylene in the odor-adsorbinglayer. Low elutable polyethylenes of the same type or the low elutablepolyethylene and a thermoplastic resin of different type may be combinedaccording to a purpose.

For example, provided that the odor adsorbent material and the lowelutable polyethylene are melt-mixed in advance, homogeneous andfavorable film formability, heat sealing properties, interlayer adhesionstrength and odor-adsorbing properties can be obtained by mixing or meltkneading with the low elutable polyethylene again.

Examples of the thermoplastic resin other than the low elutablepolyethylene in the odor-adsorbing layer include polyolefin resins suchas general-purpose non-low-elutable polyethylene, polypropylene,methylpentene polymers, and acid-modified polyolefin resins, andmixtures of these resins, though the thermoplastic resin is not limitedto these resins.

The thermoplastic resin preferably has low eluting properties equivalentto that of the low elutable polyethylene according to the presentinvention, and a general-purpose thermoplastic resin can be used withouthaving a significant adverse effect on the amount of organic mattereluted from the whole sealant layer.

(Film Formation and Lamination Methods)

In the present invention, the film formation and lamination methods foreach layer of the outer layer film or the inner layer film are notparticularly limited, and a film formation method and a laminationmethod known in the art or commonly used can be applied thereto.

The odor-adsorbing layer or the non-odor-adsorbing layer may belaminated onto a different layer, optionally via an adhesion layer, byextrusion coating, or, for example, a plurality of odor-adsorbing layersand non-odor-adsorbing layers may be formed by coextrusion according toan inflation method or a casting method.

For the lamination by extrusion coating, first, a resin compositionforming the odor-adsorbing layer or a resin composition forming thenon-odor-adsorbing layer is melted by heating, expanded and extended ina necessary width direction using a T-die, and extruded into acurtain-like form. The melted resin is allowed to flow down onto asurface to be laminated, which is then sandwiched between a rubber rolland a cooled metal roll to perform the formation of the odor-adsorbinglayer or the non-odor-adsorbing layer and its adhesive bonding andlamination to the surface to be laminated at the same time.

For the lamination by extrusion coating, the melt flow rate (MFR) of thelow elutable polyethylene contained in the odor-adsorbing layer or thethermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 50 g/10 min, more preferably 0.5 to 30 g/10 min. Inthe present specification, MFR is a value measured by an approachconforming to JIS K 7210.

If MFR is less than 0.2 g/min or more than 50 g/min, processingsuitability is less effective.

In the case of using an inflation method, the melt flow rate (MFR) ofthe low elutable polyethylene contained in the odor-adsorbing layer orthe thermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 10.0 g/10 min, more preferably 0.2 to 9.5 g/10 min.

If MFR is less than 0.2 g/10 min or more than 10.0 g/10 min, processingsuitability tends to be poor.

Alternatively, the odor-adsorbing layer and the non-odor-adsorbing layerfilm-formed in advance may be laminated via an adhesion layer by drylamination, non-solvent lamination, sand lamination, or the like.

<Method for Preparing Outer Layer Film>

The outer layer film can be prepared by the same operation as in theinner layer film except that the odor adsorbent material is notdispersed.

<Adhesion Layer>

In the present invention, an adhesion layer may be provided betweenlayers in the sealant layer or between the sealant layer and the basematerial layer, etc. for lamination.

The adhesion layer may comprise an adhesive or an arbitrary anchorcoating agent.

The adhesive can be of thermosetting type, ultraviolet cure type,electron beam cure type, or the like and may be in any form such as anaqueous, solution, emulsion, or dispersed form. Its nature is in anyform such as a film or sheet, a powder, or a solid. The adhesionmechanism may be in any form such as chemical reaction, solventvolatilization, heat melting, or thermal compression.

The adhesion layer can be an EC (extrusion coating) layer or a layercomprising an adhesive for dry lamination, an adhesive for non-solventlamination, or the like.

Examples of the component forming such an adhesion layer includepolyvinyl acetate adhesives such as polyvinyl acetate and vinylacetate-ethylene copolymers, polyacrylic acid adhesives consisting of acopolymer of polyacrylic acid with polystyrene, polyester, polyvinylacetate, or the like, cyano acrylate adhesives, ethylene copolymeradhesives consisting of a copolymer of ethylene with a monomer such asvinyl acetate, ethyl acrylate, acrylic acid, or methacrylic acid,cellulose adhesives, polyurethane adhesives, polyester adhesives,polyamide adhesives, polyimide adhesives, polyolefin adhesives such asLDPE, amino resin adhesives consisting of urea resin or melamine resin,phenol resin adhesives, epoxy adhesives, reactive (meth)acrylicadhesives, elastomer adhesives consisting of chloroprene rubber, nitrilerubber, styrene-butadiene rubber, or the like, silicone adhesives, andinorganic adhesives consisting of alkali metal silicate, low-meltingglass, or the like.

For example, an organotitanium, isocyanate, polyethylenimine,acid-modified polyethylene, or polybutadiene anchor coating agent can beused as the anchor coating agent.

In the case of laminating the adhesion layer by extrusion coating, alayer to be adhesively bonded can be extrusion-coated with the adhesiveto form the adhesion layer, though the method is not particularlylimited thereto. For the extrusion coating, first, the adhesive ismelted by heating, expanded and extended in a necessary width directionusing a T-die, and extruded into a curtain-like form. The melted productis allowed to flow down onto a layer to be adhesively bonded, which isthen sandwiched between a rubber roll and a cooled metal roll to performthe formation of the adhesion layer and its adhesive bonding andlamination to the layer to be adhesively bonded at the same time.

In the case of using an adhesive for dry lamination in the adhesionlayer, the adhesive dispersed or dissolved in a solvent is applied ontoone of the layers and dried, and the other layer to be adhesively bondedis overlaid and laminated thereto. Then, the adhesive is cured by agingat 30 to 120° C. for several hours to several days for lamination.

In the case of using an adhesive for non-solvent lamination, theadhesive itself is applied, without being dispersed or dissolved in asolvent, onto one of the layers and dried, and the other layer to beadhesively bonded is overlaid and laminated thereto. Then, the adhesiveis cured by aging at 30 to 120° C. for several hours to several days forlamination.

The adhesion layer is formed by, for example, roll coating, gravure rollcoating, or kiss coating with the adhesive. The amount of coating isdesirably on the order of 0.1 to 10 g/m² (dry state). When the amount ofcoating with the adhesive falls within the range described above,favorable adhesiveness is obtained.

For the lamination by sand lamination, an arbitrary resin that can bemelted by heating and applied to an extruder can be used in the adhesionlayer. Specifically, the thermoplastic resin for use in thenon-odor-adsorbing layer described above can be preferably used.

<Packaging Material for Liquid Content for BIB>

The packaging material for a liquid content for BIB of the presentinvention is a packaging material for preparing the upper film and thelower film of the bag portion of the liquid content package for BIB ofthe present invention, and comprises at least an outer layer film and aninner layer film. The outer layer film and the inner layer film areadhesively bonded only partially to each other, as described above.

<Liquid Content>

In the present invention, the liquid contents refer to general liquidssuch as drinking water, juices, drip infusions, seasoning liquids suchas soy sauce and sauce, soups, honey, baste, and dressing.

Object 5

<Package and Liquid Content Package for BIB>

The package and the liquid content package for BIB are the same as inthe object 4.

[Method for Preparing Package]

The method for preparing the package is the same as in the object 4.

<Content Spout>

The content spout is an entrance and/or exit port through which contentsare packed and/or taken out. The contents may be packed into and takenout of one content spout, or two or more content spouts may be providedand the contents can be packed into and taken out of the separatecontent spouts.

The content spout is not particularly limited by its installationposition and is preferably installed at or near any of four sides of thepackage.

The content spout contains a polyolefin resin and hydrophobic zeolite.The content spout may further contain a chemical adsorbent-supportedinorganic porous material.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers, polypropylene resins, cyclic polyolefin resins,methylpentene polymers, and acid-modified polyolefin resins.

The melt flow rate of the polyolefin resin is preferably 5 g/min or moreand 100 g/min or less from the viewpoint of moldability.

The content spout can also be supplemented with various plasticcompounding agents, additives, or the like for the purpose of improvingor modifying processability, heat resistance, weather resistance,mechanical properties, dimensional stability, antioxidative properties,lubricity, mold release properties, flame retardancy, antimycoticproperties, electric characteristics, strength, etc.

The content spout can be obtained by mixing and kneading various rawmaterials described above by a method known in the art to prepare aresin composition, and molding the resin composition by a method knownin the art.

A kneading method known in the art or commonly used can be applied to amethod for kneading the hydrophobic zeolite or the chemicaladsorbent-supported inorganic porous material and the polyolefin resin.

The hydrophobic zeolite or the chemical adsorbent-supported inorganicporous material may be mixed and kneaded directly with the polyolefinresin. Alternatively, a so-called master batch system may be performed,which involves mixing the hydrophobic zeolite or the chemicaladsorbent-supported inorganic porous material at a high concentrationwith a thermoplastic resin, then preparing a master batch by meltkneading, and mixing and melt-kneading this master batch with thepolyolefin resin at a ratio appropriate for the target contentpercentages.

The content of the hydrophobic zeolite in the whole content spout ispreferably 0.1% by mass or more and 13% by mass or less.

The content of the chemical adsorbent-supported inorganic porousmaterial in the whole content spout is preferably 0.1% by mass or moreand 10% by mass or less.

A content smaller than the range described above makes it difficult toexert a sufficient odor-adsorbing effect. A content larger than therange described above facilitates worsening the moldability of thecontent spout.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the hydrophobiczeolite or the chemical adsorbent-supported inorganic porous materialinto a polyolefin resin even if the combination of the hydrophobiczeolite or the chemical adsorbent-supported inorganic porous materialwith the polyolefin resin, which easily causes aggregation, is used.

The polyolefin resin described above is preferred as the thermoplasticresin for use in the master batch. However, the thermoplastic resin isnot limited thereto, and various thermoplastic resins can be usedwithout having an adverse effect.

Specific examples of the thermoplastic resin include, but are notlimited to, polyolefin resins, polystyrene resins, acrylonitrile-styrenecopolymers (AS resin), acrylonitrile-butadiene-styrene copolymers (ABSresin), poly(meth)acrylic resins, polyester resins, polyamide resins,polyurethane resins, acetal resins, and cellulose resins.

Among the resins described above, a polyolefin resin or a lowgas-permeable polyester resin is preferably contained.

Specific examples of the polyolefin resin include, but are not limitedto, polyethylene resins (LDPE, MDPE, HDPE, LLDPE, etc.), variousethylene copolymers such as ethylene-vinyl alcohol copolymer resin,polypropylene resins, cyclic polyolefin resins, methylpentene polymers,and acid-modified polyolefin resins.

Examples of the polyester resin include, but are not limited to,polycarbonate resins, polyethylene terephthalate, and polyethylenenaphthalate.

The melt flow rate of the thermoplastic resin for use in the masterbatch is preferably 5 g/min or more and 100 g/min or less from theviewpoint of moldability.

<Layer Configurations of Outer Layer Film and Inner Layer Film>

Each of the upper film and the lower film constituting the double-bagportion of the liquid content package for BIB of the present inventioncomprises, as shown in FIG. 18 or 19, at least an outer layer film andan inner layer film. The outer layer film and the inner layer film areadhesively bonded only partially to each other.

Each of the outer layer film and the inner layer film is a film havingat least a sealant layer comprising an odor-adsorbing layer.

The sealant layer may be a layer consisting of the odor-adsorbing layeras shown in FIG. 20, or may have a multilayered structure with anon-odor-adsorbing layer containing low elutable polyethylene butcontaining no odor adsorbent material, in order to improve sealingstrength and interlayer adhesion strength, as shown in FIG. 21 or 22.

As shown in FIG. 23, the odor-adsorbing layer may have a multilayeredstructure having the same or different types of low elutablepolyethylene as a main component or the same or different types orcontents of the odor adsorbent material.

In the liquid content package for BIB of the present invention, aninnermost layer, which comes into contact with liquid contents, may bean odor-adsorbing layer or may be a non-odor-adsorbing layer. Thenon-odor-adsorbing layer serving as an innermost layer can improve thesealing strength of the package. The odor-adsorbing layer serving as aninnermost layer can improve interlayer adhesion strength within thepackage.

Each of the outer layer film and the inner layer film can also comprise,as shown in FIG. 24, a base material layer, a functional layer such as areinforcing layer, an adhesion layer, or the like in order to improvethe strength of the film or impart various functions thereto.

Particularly, the outer layer film preferably comprises a base materiallayer. A layer known in the art can be laminated for use as the basematerial layer, the functional layer, or the adhesion layer by a methodknown in the art.

<Sealant Layers of Outer Layer Film and Inner Layer Film>

[Odor-Adsorbing Layer]

The odor-adsorbing layer is the same as in the object 4.

[Low Elutable Polyethylene]

In the present invention, the sealant layer has heat sealing propertiesand contains low elutable polyethylene attaining a small amount oforganic matter eluted.

Such a small amount of organic matter eluted can decrease theconcentration of organic matter eluted into liquid contents packed inthe liquid content package for BIB of the present invention and suppresschange in taste and odor.

In this context, the concentration of the organic matter in liquidcontents is indicated by the concentration of TOC (total organic carbon)in the present invention.

TOC represents the total concentration organic matter (organic carbon)oxidizable in water by the concentration of carbon. TOC is used as atypical water quality index and is standardized by JIS K 0805 (automatictotal organic carbon (TOC) analyzer), etc.

The concentration of elutable TOC contained in a film consisting of thelow elutable polyethylene is 1.5 ppm or higher and 250 ppm or lower.

In this context, the concentration of elutable TOC as to the lowelutable polyethylene as a single raw material is measured in a filmstate, not in a state such as raw material pellets, because the lowelutable polyethylene may increase the amount of TOC eluted by theapplication of various heat histories, etc. during film preparation suchas sealant layer formation.

After packing of 1 kg of distilled water as filling water into a 15cm×44 cm×50 μm thick pouch packaging bag prepared from the low elutablepolyethylene according to the present invention, followed by elution,the increased concentration of TOC in the filling water is preferably0.01 ppm or higher and 1.5 ppm or lower, more preferably 0.02 ppm orhigher and 1.45 ppm or lower, further preferably 0.025 ppm or higher and1.4 ppm or lower.

If the increased concentration of TOC in the filling water is largerthan 1.5 ppm, it is difficult to suppress change in taste and odor ofthe filling water. In order to obtain this concentration of smaller than0.01 ppm, effects are limited though cost is high. The range describedabove is preferred from the viewpoint of the balance between cost andperformance.

In order to specifically determine the increased concentration of TOC,for example, 1000 g of distilled water of 40° C. to 80° C. is packed asfilling water into the pouch packaging bag described above, which isthen stored at 25° C. to 50° C. for several days to 4 weeks. Then, theTOC concentration of the filling water is measured using a total organiccarbon meter or HS-GC. The TOC concentration of the distilled water as ablank can be subtracted therefrom to determine the increasedconcentration of TOC.

In the present invention, the increased concentration of TOC isdetermined by a standard method which involves preparing a package of apouch bag (15 cm×44 cm) using the packaging material for a liquidcontent package for BIB, the outer layer film, and the inner layer film,packing thereinto 1000 g of water (distilled water for high-performanceliquid chromatography, Junsei Chemical Co., Ltd.) of 65° C. to prepare aliquid-packed package, which is then stored at 35° C. for 2 weeks, andthen measuring the TOC concentration of the filling water using TOC-Ltotal organic carbon meter manufactured by Shimadzu Corp.

Then, the concentration of elutable TOC contained in the sealant film iscalculated from the obtained increased TOC concentration of the fillingwater, parts by mass of the filling water, and parts by mass of thesealant film.

Specific examples of the low elutable polyethylene include low-elutionresins such as low-density polyethylene (LDPE), medium-densitypolyethylene (MDPE), high-density polyethylene (HDPE), linearlow-density polyethylene (LLDPE), ethylene-vinyl acetate copolymers,ethylene-ethyl acrylate copolymers, ethylene-acrylic acid copolymers,ethylene-methacrylic acid copolymers, ethylene-methyl methacrylatecopolymers, and ethylene-propylene copolymers, and mixtures of theseresins, though the low elutable polyethylene is not limited to theseresins.

Examples of the method for decreasing the amount of organic mattereluted from a low elutable polyethylene film include, but are notlimited to, the following methods.

Decrease in residual amounts of unreacted raw materials or amounts oflow-molecular-weight products or by-products, or the removal of apolymerization catalyst in the production of the polyethylene iseffective. A specific method involves improving a raw material purity,precisely controlling conditions such as a reaction temperature or apressure, removing unreacted raw materials, low-molecular-weightproducts, by-products or a polymerization catalyst by distillation orwashing, or preventing oxidation ascribable to contact with oxygen inair at a high temperature.

For the pelletization of the produced polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, and other additiveswhich may elevate the amount of organic matter eluted.

For the film preparation of the polyethylene, a method involvesrestricting use of a lubricant, an antioxidant, a solvent, and otheradditives which may elevate the amount of organic matter eluted, orpreventing oxidation ascribable to a high temperature.

In the present invention, the sealant layer has heat sealing propertiesand contains low elutable polyethylene. Thus, a packaging materialcomprising the sealant film has excellent heat sealing properties,attains a small amount of organic matter eluted, and can reduce increasein TOC concentration in liquid contents in the package.

The polyethylene is suitable because of its properties of beingresistant to sterilization/disinfection treatment such as UV and beingless decomposable.

Among these low elutable polyethylenes, the type is preferably LLDPE.Since LLDPE having a C4, C6, or C8 side chain tends to be capable ofdecreasing the amount of organic matter eluted, C4-LLDPE, C6-LLDPE,C8-LLDPE, or the like is more preferred.

In this context, C4, C6, or C8 means that a monomer having the describednumerical value as the number of carbon atoms is present at a side chainby partial copolymerization with LLDPE. For example, C4 represents aside chain having a butene-1 structure; C6 represents a side chainhaving a hexene-1 or 4-methylpentene-1 structure; and C8 represents aside chain having an octene-1 structure.

Alternatively, low elutable polyethylene having a density of 0.90 g/cm³or larger and 0.94 g/cm³ or smaller is preferred, and low elutablepolyethylene having a density of 0.905 g/cm³ or larger and 0.933 g/cm³or smaller is more preferred. The low elutable polyethylene having adensity within this range tends to be capable of decreasing the amountof organic matter eluted.

The low elutable polyethylene may contain a small amount of an additivesuch as an antioxidant or an antiblocking agent.

The low elutable polyethylene according to the present invention ispreferably excellent in resistance to pinholes attributed to flexionwhen singly prepared into a film.

As for the pinhole resistance of the low elutable polyethylene accordingto the present invention, for example, the number of pinholes formedafter 5000 Gelbo flexes at 23° C. in a 50 μm thick film consisting ofthe low elutable polyethylene singly is preferably 0 or 1 or more and160 or less.

When the number of pinholes formed in the sealant layer falls within therange described above, a packaging material workable for an applicationrequiring pinhole resistance can be prepared.

[Odor Adsorbent Material]

The odor adsorbent material is the same as in the object 4.

<Non-Odor-Adsorbing Layer>

The non-odor-adsorbing layer is the same as in the object 4.

<Method for Preparing Outer Layer Film or Inner Layer Film>

(Method for Dispersing Odor Adsorbent Material)

A kneading method known in the art or commonly used can be applied to amethod for kneading the odor adsorbent material and the low elutablepolyethylene.

The odor adsorbent material may be mixed and kneaded directly with thelow elutable polyethylene. Alternatively, a so-called master batchsystem may be performed, which involves mixing the odor adsorbentmaterial at a high concentration with a thermoplastic resin, thenpreparing a master batch by melt kneading, and mixing and melt-kneadingthis master batch with the low elutable polyethylene at a ratioappropriate for the target content percentages.

The content percentage of the hydrophobic zeolite in the master batch ispreferably 0.5% by mass or more and 40% by mass or less, more preferably1% by mass or more and 20% by mass or less.

The content percentage of the chemical adsorbent-supported inorganicporous material in the master batch is preferably 0.5% by mass or moreand 40% by mass or less, more preferably 1% by mass or more and 20% bymass or less.

The master batch system can homogeneously disperse the odor adsorbentmaterial into the low elutable polyethylene even if the combination ofthe odor adsorbent material with the low elutable polyethylene, whicheasily causes aggregation, is used.

In this respect, the thermoplastic resin in the master batch may or maynot be the same as the low elutable polyethylene in the odor-adsorbinglayer. Low elutable polyethylenes of the same type or the low elutablepolyethylene and a thermoplastic resin of different type may be combinedaccording to a purpose.

For example, provided that the odor adsorbent material and the lowelutable polyethylene are melt-mixed in advance, homogeneous andfavorable film formability, heat sealing properties, interlayer adhesionstrength and odor-adsorbing properties can be obtained by mixing or meltkneading with the low elutable polyethylene again.

Examples of the thermoplastic resin other than the low elutablepolyethylene in the odor-adsorbing layer include polyolefin resins suchas general-purpose non-low-elutable polyethylene, polypropylene,methylpentene polymers, and acid-modified polyolefin resins, andmixtures of these resins, though the thermoplastic resin is not limitedto these resins.

The thermoplastic resin preferably has low eluting properties equivalentto that of the low elutable polyethylene according to the presentinvention, and a general-purpose thermoplastic resin can be used withouthaving a significant adverse effect on the amount of organic mattereluted from the whole sealant layer.

(Film Formation and Lamination Methods)

In the present invention, the film formation and lamination methods foreach layer of the outer layer film or the inner layer film are notparticularly limited, and a film formation method and a laminationmethod known in the art or commonly used can be applied thereto.

The odor-adsorbing layer or the non-odor-adsorbing layer may belaminated onto a different layer, optionally via an adhesion layer, byextrusion coating, or, for example, a plurality of odor-adsorbing layersand non-odor-adsorbing layers may be formed by coextrusion according toan inflation method or a casting method.

For the lamination by extrusion coating, first, a resin compositionforming the odor-adsorbing layer or a resin composition forming thenon-odor-adsorbing layer is melted by heating, expanded and extended ina necessary width direction using a T-die, and extruded into acurtain-like form. The melted resin is allowed to flow down onto asurface to be laminated, which is then sandwiched between a rubber rolland a cooled metal roll to perform the formation of the odor-adsorbinglayer or the non-odor-adsorbing layer and its adhesive bonding andlamination to the surface to be laminated at the same time.

For the lamination by extrusion coating, the melt flow rate (MFR) of thelow elutable polyethylene contained in the odor-adsorbing layer or thethermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 50 g/10 min, more preferably 0.5 to 30 g/10 min. Inthe present specification, MFR is a value measured by an approachconforming to JIS K 7210.

If MFR is less than 0.2 g/min or more than 50 g/min, processingsuitability is less effective.

In the case of using an inflation method, the melt flow rate (MFR) ofthe low elutable polyethylene contained in the odor-adsorbing layer orthe thermoplastic resin contained in the non-odor-adsorbing layer ispreferably 0.2 to 10.0 g/10 min, more preferably 0.2 to 9.5 g/10 min.

If MFR is less than 0.2 g/10 min or more than 10.0 g/10 min, processingsuitability tends to be poor.

Alternatively, the odor-adsorbing layer and the non-odor-adsorbing layerfilm-formed in advance may be laminated via an adhesion layer by drylamination, non-solvent lamination, sand lamination, or the like.

<Adhesion Layer>

The adhesion layer is the same as in the object 4.

<Packaging Material for Liquid Content for BIB>

The packaging material for a liquid content for BIB is the same as inthe object 4.

<Liquid Content>

The liquid contents are the same as in the object 4.

EXAMPLES Object 1

<Raw Material>

The detailed raw materials used in Examples are as described below.

[Thermoplastic Resin A of Odor-Adsorbing Molded Article]

TABLE 1 Polyethylene Type of Density MFR [g/10 No. Supplier Polyethylene[g/cm³] minutes] Novatec Japan Polyethylene LLDPE 0.921 16 UF370Corporation Novatec Japan Polyethylene LLDPE 0.925 20 UF580 CorporationNovatec Japan Polyethylene LDPE 0.918 23 LJ8041 Corporation NovatecJapan Polyethylene LDPE 0.915 45 LJ902 Corporation Novatec JapanPolyethylene HDPE 0.953 5 HJ362N Corporation

[Hydrophobic Zeolite]

MIZUKASIEVES EX-122: manufactured by Mizusawa Industrial Chemicals,Ltd., SiO₂/AL₂O₃ molar ratio=32/1, average particle size=2.5 to 5.5

SILTON MT400: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/AL₂O₃ molar ratio=400/1, average particle size=5 to 7

SILTON MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/AL₂O₃ molar ratio=8000/1, average particle size=0.8

[Hydrophilic Zeolite]

MIZUKASIEVES Y-420: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/AL₂O₃ molar ratio=5/1, average particle size=5 μm.

[Chemical Adsorbent-Supported Inorganic Porous Material]

KESMON NS-241: manufactured by Toagosei Co., Ltd., an aminogroup-containing compound-supported inorganic porous material, averageparticle size: 3.5 μm.

<Preparation of Master Batch>

Each master batch was prepared as described below.

[Preparation of Master Batch 1]

Novatec UF370 as the thermoplastic resin A and MIZUKASIEVES EX-122 asthe hydrophobic zeolite were melt-blended at the following proportionsto obtain master batch 1 (MB1).

Novatec UF370 90 parts by mass MIZUKASIEVES EX-122 10 parts by mass

(Preparation of Master Batches 2 to 5)

The thermoplastic resin B and the hydrophobic zeolite or the chemicaladsorbent-supported inorganic porous material were melt-blended in thesame way as in the master batch 1 according to the formulation of Table2 to obtain master batches 2 to 5 (MB2 to MB5).

TABLE 2 MB for resin composition for odor- adsorbing molded article UnitMB1 MB2 MB3 MB4 MB5 Composition Thermoplastic resin B Novatec UF370Parts by 90 90 90 90 80 mass Hydrophobic zeolite Mizukasieves EX-122Parts by 10 mass Silton MT400 Parts by 10 20 mass Silton MT8000 Parts by10 mass Chemical adsorbent- Kesmon NS-241 Parts by 10 supportedinorganic mass porous material

Example 1

The master batch 1 obtained as described above and Novatec UF370 weredry-blended at the following proportions to obtain a resin composition.

Master batch 1 10 parts by mass Novatec UF370 90 parts by mass

Then, the resin composition obtained as described above wasinjection-molded at 200° C. to prepare a content spout molded article.

Examples 2 to 10

The master batch and the thermoplastic resin A were selected accordingto the description of Table 3. Each resin composition was obtained bythe same operation as in Example 1, and each content spout moldedarticle was prepared.

Comparative Example 1

A content spout molded article was prepared by the same operation as inExample 1 using only Novatec UF370 without being supplemented with themaster batch.

<Evaluation>

[Sensory Evaluation]

According to the dry lamination method, an adhesive (Rock Paint Co.,Ltd., RU004/H1, amount of dry coating: 3.5 g/m²) was applied to each ofa PET film (manufactured by Toyobo Co., Ltd., ESPET T4102, thickness: 12μm), an aluminum foil (manufactured by Toyo Aluminium K.K., thickness:12 μm), and a LLDPE film (manufactured by Toyobo Co., Ltd., LIX L6100,thickness: 50 μm) and dried at 70° C. to obtain a PET 12 μm/adhesionlayer/Al foil 7 μm/adhesion layer/LLDPE 50 μm multilayered film. Themultilayered film was used to prepare a pouch bag (13 cm×17 cm). Theinner face of each laminate was subjected to disinfection treatment byUV irradiation in advance.

When each pouch bag thus obtained was hot-packed with 100 g of water(manufactured by Suntory Holdings Ltd., Minami Alps no Tennensui) of 65°C., one content spout molded article obtained in each Example orComparative Example was also installed therein to prepare aliquid-packed package, which was then stored at 10° C. for 1 week. Then,sensory evaluation was conducted as to change in taste and odor.

The evaluation index is as described below. The number of participantsin the sensory evaluation experiment was 5, and an average value wascalculated and used as evaluation results.

1: Taste and odor were heavy.

2: Taste and odor were slightly lessened.

3: Taste and odor were drastically lessened.

4: Taste and odor were equivalent to those of water before packing.

TABLE 3 Comparative Example Example Unit 1 2 3 4 5 6 7 8 9 10 1Composition Master Batch MB1 Parts by 10 of resin mass composition MB2Parts by 10 7.5 10 10 10 10 mass MB3 Parts by 10 mass MB4 Parts by 2.5mass MB5 Parts by 5 50 mass Thermoplastic NovatecUF370 Parts by 90 90 9090 95 50 100 Resin A mass NovatecUF580 Parts by 90 mass NovatecLJ8041Parts by 90 mass NovatecLJ902 Parts by 90 mass NovatecHJ362N Parts by 90mass Characteristics Odor adsorbent Hydrophobic zeolite % by 1 1 1 0.751 5 1 1 1 1 0 material content mass Chemical adsorbent- % by 0 0 0 0.250 0 0 0 0 0 0 supported inorganic mass porous material EvaluationMoldability — ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ results Change in odor and taste —3.0 3.5 3.5 3.0 2.5 4.0 3.5 3.5 3.5 3.5 1.0

<Summary of Results>

Favorable results about moldability and change in taste and odor wereobtained in all Examples containing the thermoplastic resin A and theodor adsorbent material, whereas favorable results about change in tasteand odor were not obtained in Comparative Example 1 containing no odoradsorbent material.

Object 2 EXAMPLES

The detailed raw materials used in Examples are as described below.

[Low Elutable Polyethylene for Inner Layer Film and Outer Layer Film andGeneral-Purpose Polyethylene]

The polyethylenes described in Table 1 and the following polyethyleneswere used.

UMERIT 0520F: manufactured by Ube Industries, Ltd., LLDPE.

Novatec LC520: manufactured by Japan Polyethylene Corp., LDPE resin.

TABLE 1 Type of MFR Elution Polyethylene Poly- Density [g/10 property NoSupplier ethylene [g/cm³] minutes] Low Ultzex1520L Prime Polymer C6-0.916 2.3 elution Co., Ltd. LLDPE property Ultzex2021L Prime Polymer C6-0.920 2.0 Co., Ltd. LLDPE Ultzex3520L Prime Polymer C6- 0.931 2.1 Co.,Ltd. LLDPE Neo-Zex3510F Prime Polymer C4- 0.933 1.6 Co., Ltd. LLDPEGeneral EvolueSP2020 Prime Polymer C6- 0.916 2.1 purpose Co., Ltd. LLDPE

[Resin for Content Spout and Molding]

Content spouts A to E were obtained by injection molding at 200° C.using the low elutable polyethylene for a resin molded article describedin the table.

TABLE 2 Type of Density MFR [g/10 Content spout Polyethylene No.Supplier Polyethylene [g/cm³] minutes] Content spout A Novatec UF370Japan Polyethylene LLDPE 0.921 16 Corporation Content spout B NovatecUF580 Japan Polyethylene LLDPE 0.925 20 Corporation Content spout CNovatec LJ8041 Japan Polyethylene LDPE 0.918 23 Corporation Contentspout D Novatec LJ902 Japan Polyethylene LDPE 0.915 45 CorporationContent spout E Novatec HJ362N Japan Polyethylene HDPE 0.953 5Corporation

[Odor Adsorbent Material]

(Chemical Adsorbent-Supported Inorganic Porous Material)

KESMON NS-241: manufactured by Toagosei Co., Ltd., an aminogroup-containing compound-supported inorganic porous material, averageparticle size: 3.5 μm.

(Hydrophobic Zeolite)

MIZUKASIEVES EX-122: manufactured by Mizusawa Industrial Chemicals,Ltd., SiO₂/Al₂O₃ molar ratio=32/1, average particle size: 2.5 to 5.5 μm.

SILTON MT400: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=400/1, average particle size: 5 to 7 μm.

SILTON MT2000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=2000/1, average particle size: 2 to 4 μm.

SILTON MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=8000/1, average particle size: 0.8 μm.

(Hydrophilic Zeolite)

MIZUKASIEVES Y-420: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=5/1, average particle size: 5 μm.

[Base Material Film]

BONYL RX: manufactured by KOHJIN Film & Chemicals Co., Ltd., a biaxiallydrawn nylon film, 15 μm thick.

IB-ONY: manufactured by Dai Nippon Printing Co., Ltd., a gas-barrierbiaxially drawn nylon film, 15 μm thick.

[Others]

EMB-21: manufactured by Sumitomo Chemical Co., Ltd., an antiblockingagent.

PEX ABT-16: Japan Polyethylene Corp., an antiblocking agent.

EMB-10: Sumitomo Chemical Co., Ltd., a slipping agent.

[Preparation of Master Batch]

Each MB (master batch) of the outer layer film or the inner layer filmwas prepared as described below.

(Preparation of MB1)

LLDPE ULT-ZEX 1520L as the low elutable polyethylene and hydrophobiczeolite MIZUKASIEVES EX-122 were melt-blended at the followingproportions to obtain master batch 1 (MB1).

ULT-ZEX 1520L 90 parts by mass MIZUKASIEVES EX-122 10 parts by mass

(Preparation of MB2 to MB13)

The raw materials were melt-blended in the same way as in MB1 accordingto the formulation of Table 3 or 4 to obtain master batches 2 to 13 (MB2to MB13).

TABLE 3 MB for outer layer film and inner layer film Unit MB1 MB2 MB3MB4 MB5 MB6 MB7 MB8 MB9 Thermoplastic Ultzex1520L Parts by 90 90 90 9090 80 90 80 resin mass Novatec LC600A Parts by 90 mass HydrophobicMizukasieves Parts by 10 zeolite EX-122 mass Silton MT400 Parts by 10 1020 10 mass Silton MT2000 Parts by 10 mass Silton MT8000 Parts by 10 massHydrophilic Mizukasieves Parts by 10 zeolite Y-420 mass Chemical KesmonNS-241 Parts by 20 adsorbent- mass supported inorganic porous material

[Preparation of Outer Layer Film]

The outer layer films A to I described in Table 4 were prepared.

(Preparation of Outer Layer Film A)

ULT-ZEX 1520L was used in film formation by inflation at 160° C. toprepare an 80 μm sealant film, which was used as outer layer film A. Itslayer configuration and evaluation results are shown in Table 4.

(Preparation of Outer Layer Film B)

First, ULT-ZEX 1520L was used in film formation and lamination byinflation at 160° C. to prepare a 40 μm sealant film and made an outerlayer film A. The layer structure and evaluation results are shown inTable 4.

Next, biaxially drawn nylon film BONYL RX and the sealant film obtainedas described above were laminated via Novatec LC520 used as an adhesionlayer by the extrusion coating method at 320° C. to obtain outer layerfilm B. Its layer configuration and evaluation results are shown inTable 4.

(Preparation of Outer Layer Film C)

First, ULT-ZEX 1520L, a mixture of UMERIT 0520F/MB2=mass ratio 50/50,and a mixture of ULT-ZEX 1520L/EMB-21=mass ratio 97/3 were used in filmformation and lamination by inflation at 160° C. to prepare a sealantfilm.

Next, biaxially drawn nylon film BONYL RX was laminated to the ULT-ZEX1520L side of the sealant film obtained as described above via NovatecLC520 used as an adhesion layer by the extrusion coating method at 320°C. to obtain outer layer film A.

Its layer configuration and evaluation results are shown in Table 4.

(Preparation of Outer Layer Films D, F, and H)

Outer layer films D, F, and H were obtained by the same operation as inthe outer layer film C according to the configuration described in Table4. Their layer configurations and evaluation results are shown in Table4.

(Preparation of Outer Layer Films E, G, and I)

Outer layer films E, G, and I were obtained by the same operation as inthe outer layer film A according to the configuration described in Table4. Their layer configurations and evaluation results are shown in Table4.

TABLE 4 Outer layer film Unit A B C D E F G H I Layer Base materialBiaxially drawn BonilRX μm 15 15 15 15 thickness layer nylon film IB-ONYμm 15 (gas-barrier) Adhesion layer LDPE NovatecLC520 μm 15 15 15 15 15Sealant Layer Non-odor-adsorbing layer 1 μm 80 40 10 10 Odor-adsorbinglayer μm 20 20 80 40 80 40 80 Non-odor-adsorbing layer μm 10 10 Com-Sealant Non-odor- Low-elution Ultzex1520L Parts by 100 100 100 100position Layer adsorbing Polyethylene mass layer 1 Odor- Low-elutionUMERIT0520F Parts by 50 50 adsorbing Polyethylene mass layer Ultzex1520LParts by 81.5 50 50 16.7 16.7 Masterbatch MB2 Parts by 50 50 16.7 massMBB Parts by 50 50 83.3 83.3 mass OTHER EMB-10 Parts by 1.0 mass PEXABT-16 Parts by 0.8 mass Non-odor- Low-elution Ultzex1520L Parts by 9797 adsorbing Polyethylene mass layer 2 OTHER EMB-21 Parts by 3 3 massCharacter- Polyethylene Increment of TOC Article ppm 0.74 0.74 0.74 0.740.74 0.74 0.74 0.74 0.74 istics single film concentration ofunirradiated filling water with UV Article ppm 0.88 0.88 0.88 0.88 0.880.88 0.88 0.88 0.88 irradiated with UV Pinhole resistance Holes 2 2 2 22 2 2 2 2 Content in the Hydrophobic Zeolite % by 0 0 1.7 1.7 1.7 10 1016.7 16.7 whole sealant mass film Chemical % by 0 0 1.7 1.7 1.7 0 0 0 0adsorbent-supported mass inorganic porous material Hydrophilic Zeolite %by 0 0 0 0 0 0 0 0 0 mass Evaluation Film-forming properties — ◯ ◯ ◯ ◯ ◯◯ ◯ ◯ ◯ results

Example 1

[Preparation of Inner Layer Film]

The following mixture 1 and mixture 2 were prepared for anodor-adsorbing layer and a non-odor-adsorbing layer, respectively.

Mixture 1:

UMERIT 0520F 50 parts by mass MB2 50 parts by mass

Mixture 2:

ULT-ZEX 1520L 97 parts by mass EMB-21  3 parts by mass

ULT-ZEX 1520L, the mixture 1, and the mixture 2 were used in filmformation and lamination by inflation at 160° C. to prepare inner layerfilm A having a 3-layer configuration. The details are shown in Table 5.

[Preparation and Evaluation of Package]

The outer layer film A, the inner layer film A, and the content spout Aobtained as described above were used to prepare the package shown inFIG. 4 (size of double-bag portion: 450 mm×450 mm, diameter of contentspout A: 31 mm), which was then evaluated for heat sealing properties,bag rupture resistance characteristics, pinhole resistance (inner layerfilm), and increased TOC concentration in filling water.

The detailed configuration and evaluation results of the laminate areshown in Table 5.

Examples 2 to 19 and Comparative Examples 1 to 5

Each mixture for the odor-adsorbing layer and/or the non-odor-adsorbinglayer was obtained in the same way as in Example 1 according to theformulation described in Tables 5 to 8, and each inner layer film wasprepared.

Then, each package was prepared by combining the inner layer film withthe outer layer film and the content spout according to the descriptionof Tables 5 to 8, and evaluated in the same way as above. The detailedconfiguration and evaluation results of the package are shown in Tables5 to 8.

<Evaluation>

[Film Formability]

The appearance was observed and sensorily evaluated.

The evaluation criteria are as described below.

Good (indicated by circle): The film was formable without causingwrinkles or grains on the film.

Poor (indicated by x-mark): The film was difficult to form due to manywrinkles or grains on the film.

[Bag Rupture Resistance Characteristics]

The inside of the package prepared in each Example or ComparativeExample was packed with 10 L of water. The operation of dropping thepackage thus packed with water from a height of 1 m was repeated a totalof three times to evaluate the presence or absence of bag rupture.

Acceptation and Rejection Criteria

Excellent (indicated by double circle): Bag rupture was absent in theevaluation by three drops. Accepted.

Good (indicated by circle): One bag was ruptured in the evaluation bythree drops. Accepted.

Poor (indicated by x-mark): All bags were ruptured in the evaluation bythree drops. Rejected.

[Pinhole Resistance of Single Inner Layer Film]

The prepared inner layer film was cut into A4 size (30 cm×21 cm) andflexed using Gelbo Flex Tester (manufactured by Tester Sangyo Co., Ltd.,BE-1005). Then, the number of pinholes formed within the 30 cm×21 cmplane of each sample was counted. 160 or less pinholes were accepted.

Temperature: 23° C.

The number of Gelbo flexes: 5000

[Pinhole Resistance of Package]

The prepared package was delivered in a packed state for transport as aliquid content package for BIB through an actual transport pathway. Thenumber of pinholes formed in the inner layer film of the bag portion wascounted. 160 or less pinholes were accepted.

[Increased TOC Concentration in Filling Water]

Before preparation of the package in each Example or ComparativeExample, the inner film side of the packaging material constituting thepackage was subjected to disinfection treatment by UV irradiation inadvance.

The package obtained in each Example or Comparative Example washot-packed with 1000 g of water (distilled water for high-performanceliquid chromatography, Junsei Chemical Co., Ltd.) of 65° C. to prepare aliquid-packed package, which was then stored at 35° C. for 2 weeks.Then, the TOC concentration of the filling water was measured usingTOC-L total organic carbon meter manufactured by Shimadzu Corp.

Subsequently, the TOC concentration of the water before packing was alsomeasured in the same way as above.

The increased TOC concentration in each package was measured accordingto the following expression.

Increased TOC concentration=TOC concentration of the filling water afterstorage−TOC concentration of the water before packing

TOC concentration of the water before packing: 0.02 ppm

Conditions of disinfection treatment by UV irradiation

UV wavelength: 253.7 nm

Irradiation time: 10 sec

Temperature: 25° C.

TABLE 5 Example Material Name Unit 1 2 3 4 5 6 Content Content spout A —◯ ◯ ◯ ◯ ◯ ◯ spout Content spout B — Content spout C — Content spout D —Content spout E — Outer Outer layer film A — ◯ layer Outer layer film B— ◯ film Outer layer film C — ◯ ◯ ◯ ◯ Outer layer film D — Outer layerfilm E — Outer layer film F — Outer layer film G — Outer layer film H —Outer layer film I — Inner layer Formulation Odor- Masterbatch MB1 Partsby 16.7 film adsorbing mass layer MB2 Parts by 16.7 16.7 16.7 mass MB3Parts by 16.7 mass MB4 Parts by 16.7 mass MB5 Parts by mass MB6 Parts bymass MB7 Parts by mass MB8 Parts by mass MB9 Parts by mass ResinLow-elution Ultzex1520L Parts by 83.3 83.3 83.3 83.3 83.3 83.3polyethylene mass Ultzex2021L Parts by mass Ultzex3520L Parts by massNeozex3510F mass General- EvolueSP2020 Parts by purpose masspolyethylene Non-Odor- Resin Low-elution Ultzex1520L Parts by 100 100100 100 100 100 adsorbing polyethylene mass layer Ultzex2021L Parts bymass Ultzex3520L Parts by mass Neozex3510F Parts by mass General-EvolueSP2020 Parts by purpose mass polyethylene Layer thickness Sealantlayer Non-odor μm 16 16 16 16 16 16 adsorbing layer Odor adsorbing μm 4848 48 48 48 48 layer Non-odor μm 16 16 16 16 16 16 adsorbing layerCharacter- Polyethylene Increment of TOC Article unirradiated ppm 0.740.74 0.74 0.74 0.74 0.74 istics single film concentration of with UV(Inner layer film) filling water Article ppm 0.88 0.88 0.88 0.88 0.880.88 irradiated with UV Pinhole resistance Holes 2 2 2 2 2 2 Content ofthe Hydrophobic Zeolite % by 0 0 1.7 1.7 1.7 1.7 whole sealant layermass of outer layer film Chemical adsorbent-supported % by 0 0 1.7 1.71.7 1.7 inorganic porous material mass Hydrophilic Zeolite % by 0 0 0 00 0 mass Content of the Hydrophobic Zeolite % by 1 1 1 1 1 1 wholesealant layer mass of Inner layer film Chemical adsorbent-supported % by0 0 0 0 0 0 inorganic porous material mass Hydrophilic Zeolite % by 0 00 0 0 0 mass Evaluation Film-forming properties — ◯ ◯ ◯ ◯ ◯ ◯ results(Inner layer & Outer layer film) Bag rupture resistance characteristics— ◯ ◯ ◯ ◯ ◯ ◯ Pinhole resistance (Inner layer film) Holes 4 4 4 4 3 5Increment of TOC concentration ppm 0.60 0.60 0.58 0.47 0.37 0.36 offilling water

TABLE 6 Example Material Name Unit 7 8 9 10 11 12 Content Content spoutA — ◯ ◯ ◯ ◯ ◯ ◯ spout Content spout B — Content spout C — Content spoutD — Content spout E — Outer Outer layer film A — layer Outer layer filmB — film Outer layer film C — ◯ ◯ ◯ ◯ ◯ ◯ Outer layer film D — Outerlayer film E — Outer layer film F — Outer layer film G — Outer layerfilm H — Outer layer film I — Inner layer Formulation Odor- MasterbatchMB1 Parts by film adsorbing mass layer MB2 Parts by 12.52 4.14 16.7 16.716.7 mass MB3 Parts by mass MB4 Parts by mass MB5 Parts by mass MB6Parts by 2.09 6.27 mass MB7 Parts by 16.7 mass MB8 Parts by mass MB9Parts by mass Resin Low-elution Ultzex1520L Parts by 85.39 89.59 83.3polyethylene mass Ultzex2021L Parts by 83.3 mass Ultzex3520L Parts by83.3 mass Neozex3510F Parts by 83.3 mass General- EvolueSP2020 Parts bypurpose mass polyethylene Non- Resin Low-elution Ultzex1520L Parts by100 100 100 odor polyethylene mass adsorbing Ultzex2021L Parts by 100mass Ultzex3520L Parts by 100 mass Neozex3510F Parts by 100 massGeneral- EvolueSP2020 Parts by purpose mass polyethylene Layer Sealantlayer Non-odor adsorbing μm 16 16 16 16 16 16 thickness layer Odoradsorbing layer μm 48 48 48 48 48 48 Non-odor adsorbing μm 16 16 16 1616 16 Character- Polyethylene Increment of TOC Article unirradiated ppm0.74 0.74 0.74 0.51 0.34 0.41 istics single film concentration of withUV (Inner layer film) filling water Article irradiated ppm 0.88 0.880.88 0.61 0.4 0.49 with UV Pinhole resistance Holes 2 2 2 15 95 120Content of the whole Hydrophobic Zeolite % by 1.7 1.7 1.7 1.7 1.7 1.7sealant layer of outer mass layer film Chemical adsorbent-supported % by1.7 1.7 1.7 1.7 1.7 1.7 inorganic porous material mass HydrophilicZeolite % by 0 0 0 0 0 0 mass Content of the whole Hydrophobic Zeolite %by 0.75 0.25 1 1 1 1 sealant layer of mass inner layer film Chemicaladsorbent-supported % by 0.25 0.75 0 0 0 0 inorganic porous materialmass Hydrophilic Zeolite % by 0 0 0 0 0 0 Evaluation Film-formingproperties — ◯ ◯ ◯ ◯ ◯ ◯ results (Inner layer & Outer layer film) Bagrapture resistance characteristics — ◯ ◯ ◯ ◯ ◯ ◯ Pinhole resistance(Inner layer film) Holes 4 4 5 20 106 135 Increment of TOC concentrationof ppm 0.50 0.57 0.48 031 0.20 0.25 filling water

TABLE 7 Example Material Name Unit 13 14 15 16 17 18 Content Contentspout A — ◯ ◯ spout Content spout B — ◯ Content spout C — ◯ Contentspout D — ◯ Content spout E — ◯ Outer Outer layer film A — layer Outerlayer film B — film Outer layer film C — ◯ ◯ Outer layer film D — ◯Outer layer film E — ◯ Outer layer film F — ◯ Outer layer film G — ◯Outer layer film H — Outer layer film I — Inner Formulation Odor-Masterbatch MB1 Parts by layer adsorbing mass film layer MB2 Parts by8.33 16.7 16.7 16.7 16.7 mass MB3 Parts by mass MB4 Parts by mass MB5Parts by mass MB6 Parts by 80 mass MB7 Parts by mass MB8 Parts by 83.3mass MB9 Parts by mass Resin Low-elution Ultzex1520L Parts by 11.67 16.783.3 83.3 83.3 83.3 polyethylene mass Ultzex2021L Parts by massUltzex3520L Parts by mass Neozex3510F Parts by mass General-EvolueSP2020 Parts by purpose mass polyethylene Non- Resin Low-elutionUltzex1520L Parts by 100 100 100 100 100 100 odor polyethylene massadsorbing Ultzex2021L Parts by mass Ultzex3520L Parts by massNeozex3510F Parts by mass General- EvolueSP2020 Parts by purpose masspolyethylene Layer Sealant layer Non-odor μm 16 16 16 16 16 16 thicknessadsorbing layer Odor μm 48 48 48 48 48 48 adsorbing layer Non-odor μm 1616 16 16 16 16 adsorbing Character- Polyethylene Increment of TOCArticle unirradiated ppm 0.74 0.74 0.74 0.74 0.74 0.74 istics singlefilm concentration of with UV (Inner layer film) filling water Articleirradiated ppm 0.88 0.88 0.88 0.88 0.88 0.88 with UV Pinhole resistanceHoles 2 2 2 2 2 2 Content of the Hydrophobic Zeolite % by 1.7 1.7 1.71.7 10 10 whole sealant layer mass of outer Chemical % by 1.7 1.7 1.71.7 0 0 layer film adsorbent-supported inorganic porous material massHydrophilic Zeolite % by 0 0 0 0 0 0 mass Content of the HydrophobicZeolite % by 0.5 10 1 1 1 1 whole sealant mass layer of inner Chemical %by 10 0 0 0 0 0 layer film adsorbent-supported inorganic porous materialmass Hydrophilic Zeolite % by 0 0 0 0 0 0 Evaluation Film-formingproperties — ◯ ◯ ◯ ◯ ◯ ◯ results (Inner layer & Outer layer film) Bagrapture resistance characteristics — ◯ Δ ◯ ◯ Δ Δ Pinhole resistance(Inner layer film) Holes 3 8 4 5 5 4 Increment of TOC concentration ofppm 0.60 0.07 0.48 0.48 0.48 0.48 filling water

TABLE 8 Example Comparative Example Material Name Unit 19 1 2 3 4 5Content Content spout A — ◯ ◯ ◯ ◯ ◯ ◯ spout Content spout B — Contentspout C — Content spout D — Content spout E — Outer Outer layer film A —◯ layer Outer layer film B — film Outer layer film C — ◯ ◯ ◯ Outer layerfilm D — Outer layer film E — Outer layer film F — Outer layer film G —Outer layer film H — ◯ Outer layer film I — ◯ Inner layer FormulationOdor- Masterbatch MB1 Parts by film adsorbing mass layer MB2 Parts bymass MB3 Parts by mass MB4 Parts by mass MB5 Parts by 16.7 mass MB6Parts by mass MB7 Parts by mass MB8 Parts by 75 75 75 mass MB9 Parts by16.7 mass Resin Low-elution Ultzex1520L Parts by 83.3 25 25 25polyethylene mass Ultzex2021L Parts by mass Ultzex3520L Parts by massNeozex3510F Parts by mass General- EvolueSP2020 Parts by 100 83.3purpose mass polyethylene Non- Resin Low-elution Ultzex1520L Parts by100 odor polyethylene mass adsorbing Ultzex2021L Parts by massUltzex3520L Parts by mass Neozex3510F Parts by mass General-EvolueSP2020 Parts by 100 100 purpose mass polyethylene Layer Sealantlayer Non-odor μm 16 80 16 thickness adsorbing layer Odor μm 48 48 80 8080 adsorbing layer Non-odor μm 16 16 adsorbing Character- PolyethyleneIncrement of TOC Article ppm 0.74 2.56 2.56 0.74 0.74 0.74 istics singlefilm concentration of unirradiated filling water with UV (Inner layerArticle ppm 0.88 3.07 3.07 0.88 0.88 0.88 film) irradiated with UVPinhole resistance Holes 2 12 12 2 2 2 Content of the HydrophobicZeolite % by 1.7 0 1.7 1.7 16.7 16.7 whole sealant mass layer of outerChemical % by 1.7 0 1.7 1.7 0 0 layer film adsorbent-supported inorganicporous material mass Hydrophilic Zeolite % by 0 0 0 0 0 0 mass Contentof the Hydrophobic Zeolite % by 1 0 0 15 15 15 whole sealant mass layerof inner Chemical % by 0 0 0 0 0 0 layer film adsorbent-supportedinorganic porous material mass Hydrophilic Zeolite % by 0 0 2.0 0 0 0Evaluation Film-forming properties — ◯ ◯ ◯ ◯ × × results (Inner layer &Outer layer film) Bag rapture resistance characteristics — ◯ ◯ ◯ × × ×Pinhole resistance (Inner layer film) Holes 4 12 21 20 20 20 Incrementof TOC concentration of ppm 0.47 2.61 2.50 0.04 0.03 0.02 filling water

<Summary of Results>

The packages of all Examples exhibited favorable film formability, bagrupture resistance characteristics, heat sealing properties, and pinholeresistance and also had a small increased TOC concentration.

Comparative Example 1 using the outer layer film containing no odoradsorbent and the inner layer film containing neither the low elutablepolyethylene nor the odor adsorbent, and Comparative Example 2 using theinner layer film containing no low elutable polyethylene and containinghydrophilic zeolite instead of hydrophobic zeolite exhibited a tendencyof a high increased TOC concentration. Comparative Examples 3, 4, and 5using the outer layer film or the inner layer film containing too largean amount of hydrophobic zeolite resulted in poor film formability ofthe outer layer film or the inner layer film and poor heat sealingproperties and bag rupture resistance characteristics, though decreasein TOC concentration was large.

Object 3 EXAMPLES

The detailed raw materials used in Examples are as described below.

PET film 1: manufactured by Toyobo Co., Ltd., T4102, corona-treated onone side, thickness: 12 μm.

Aluminum foil 1: manufactured by Toyo Aluminium K.K., thickness: 7 μm.

[Resin Component of Sealant Film]

TABLE 1 MFR Type Density [g/10 Resin No. Supplier of resin [g/cm³]minutes] Ultzex1520L Prime Polymer Co., Ltd. C6-LLDPE 0.916 2.3Ultzex2021L Prime Polymer Co., Ltd. C6-LLDPE 0.920 2.0 Ultzex3520L PrimePolymer Co., Ltd. C6-LLDPE 0.931 2.1

[Resin Component of Adhesion Layer (Extrusion Coating)]

LC600A: manufactured by Japan Polyethylene Corp., LDPE, MFR: 7.0 g/10min, density: 0.918 g/cm³

[Resin Component of Adhesion Layer (Dry Lamination)]

Dry lamination adhesive 1: manufactured by Rock Paint Co., Ltd.,RU004/H-1, a polyester adhesive, amount of coating: 3.5 g/m² peradhesion layer, drying temperature: 70° C.

[Odor Adsorbent Material]

KESMON NS-241: manufactured by Toagosei Co., Ltd., an aminogroup-containing compound-supported inorganic porous material, averageparticle size: 3.5 μm.

[Hydrophobic Zeolite]

MIZUKASIEVES EX-122: manufactured by Mizusawa Industrial Chemicals,Ltd., SiO₂/Al₂O₃ molar ratio=32/1, average particle size=2.5 to 5.5

SILTON MT400: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=400/1, average particle size=5 to 7 μm.

SILTON MT2000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=2000/1, average particle size=2 to 4 μm.

SILTON MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=8000/1, average particle size=0.8

Hydrophilic zeolite: MIZUKASIEVES Y-420 manufactured by MizusawaIndustrial Chemicals, Ltd., SiO₂/Al₂O₃ molar ratio=5/1, average particlesize=5 μm.

[Preparation of Master Batch]

Each master batch was prepared as described below.

(Preparation of Master Batch 1)

LLDPE Novatec LC600A as the thermoplastic resin A and hydrophobiczeolite MIZUKASIEVES EX-122 as the odor adsorbent material weremelt-blended at the following proportions to obtain master batch 1(MB1).

Novatec LC600A 90 parts by mass MIZUKASIEVES EX-122 10 parts by mass

(Preparation of Master Batches 2 to 7)

The thermoplastic resin A and the odor adsorbent material weremelt-blended in the same way as in the master batch 1 according to theformulation of Table 2 to obtain master batches 2 to 7 (MB2 to MB7).

TABLE 2 Masterbatch Unit MB1 MB2 MB3 MB4 MB5 MB6 MB7 Formulation odoradsorbent Hydrophobic Mizukasieves Parts by 10 ratio material zeoliteEX-122 mass Silton MT400 Parts by 10 10 20 mass Silton MT8000 Parts by10 mass Chemical Kesmon NS-241 Parts by 10 20 adsorbent- mass supportedinorganic porous material Thermoplastic resin A Ultzex1520L Parts by 90mass Novatec LC600A Parts by 90 90 90 90 80 80 mass

[Preparation of Odor-Adsorbing Sealant Layer Resin Composition]

(Preparation of Resin Composition 1 for Odor-Adsorbing Sealant Layer)

The master batch 1 (MB1) and LLDPE ULT-ZEX 1520L as the thermoplasticresin C were melt-blended at the following proportions to obtainodor-adsorbing sealant layer resin composition 1.

Master batch 1 16.7 parts by mass ULT-ZEX 1520L 83.3 parts by mass

(Preparation of Resin Compositions 2 to 12 for Odor-Adsorbing SealantLayer)

The master batch and the thermoplastic resin C were melt-blended in thesame way as in the resin composition 1 for the odor-adsorbing sealantlayer according to the formulation of Table 3 to obtain odor-adsorbingsealant layer resin compositions 2 to 12.

TABLE 3 Odor-adsorbing sealant layer resin composition Unit 1 2 3 4 5 67 8 9 10 11 12 13 Form- Master Batch MB1 Parts by 16.7 ulation mass MB2Parts by 16.7 12 5 16.7 16.7 8.33 33 mass MB3 Parts by 16.7 mass MB4Parts by 5 12 mass MB5 Parts by 16.7 mass MB6 Parts by 83.3 20 85 massMB7 Parts by 28.3 67 mass Thermoplastic Ultzex Parts by 83.3 83.3 83.383.3 83 83 91.67 16.7 51.7 15 Resin C 1520L mass Ultzex Parts by 83.32021L mass Ultzex Parts by 83.3 3520L mass Comp- Odor Hydro- Mizuka- %by 1.7 osition adsorbent phobic sieves mass material zeolite EX-122Silton % by 1.7 1.7 1.2 0.5 1.7 1.7 0.8 16.7 4.0 17.0 3.3 MT400 massSilton % by 1.7 MT8000 mass Chemical Kesmon % by 0.5 1.2 5.7 13.4adsorbent- NS-241 mass supported inorganic porous material ThermoplasticUltzex % by 83.3 83.3 83.3 98.3 83.0 83.0 91.7 16.7 51.7 15.0 Resin A, C1520L mass Ultzex % by 83.3 2021L mass Ultzex % by 83.3 3520L massNovatec % by 15.0 15.0 15.0 15.3 15.3 15.0 15.0 7.5 66.6 38.6 68.0 83.3LC600A mass Total % by 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0100.0 100.0 100.0 100.0 100.0 mass

[Preparation of Adhesion Layer Resin Composition]

(Preparation of Adhesion Layer Resin Composition 1)

Hydrophobic zeolite MIZUKASIEVES EX-122 as the odor adsorbent materialand dry lamination adhesive 1 as the adhesive were mixed at thefollowing proportions to obtain adhesion layer resin composition 1.

MIZUKASIEVES EX-122 10 parts by mass Dry lamination adhesive 1 90 partsby mass

(Preparation of Adhesion Layer Resin Compositions 2 to 12)

The odor adsorbent material or the master batch and the adhesive weremelt-blended in the same way as in the adhesion layer resin composition1 according to the formulation of Table 4 to obtain adhesion layer resincompositions 2 to 12.

TABLE 4 Adhesion layer resin composition For dry lamination Forextrusion coating Unit 1 2 3 4 5 6 7 8 9 10 11 12 Formulation OdorHydrophobic zeolite Mizukasieves Parts by 10 adsorbent EX-122 massmaterial Silton MT400 Parts by 10 7.5 47 53 mass Silton MT8000 Parts by10 mass Chemical adsorbent- Kesmon NS-241 Parts by 2.5 supportedinorganic mass porous material Master Batch MB1 Parts by 16.7 mass MB2Parts by 16.7 16.7 mass MB3 Parts by 16.7 mass MB4 Parts by 16.7 massMB5 Parts by 75 mass MB6 Parts by 26.4 mass MB7 Parts by 26.4 massAdhesive B Dry laminate Parts by 90 90 90 90 53 47 adhesive 1 massLC600A Parts by 83.3 83.3 83.3 66.6 25.0 47.2 mass Composition OdorHydrophobic zeolite Mikukasieves % by 10 1.7 adsorbent EX-122 massmaterial Silton MT400 % by 10 7.5 47 53 1.7 1.7 15 5.3 mass SiltonMT8000 % by 10 1.7 mass Chemical adsorbent- Kesmon NS-241 % by 2.5 1.75.3 supported inorganic mass porous material Thermoplastic Resin BUltzex1520L % by mass Novatec LC600A % by mass RU004/H1 % by 90 90 90 9053 47 mass LC600A % by 98.3 98.3 98.3 96.7 85 89.4 mass Total % by 100100 100 100 100 100 100 100 100 100 100 100 mass

Example 1

Odor-adsorbing sealant layer resin composition 1 for the odor-adsorbingsealant layer and ULT-ZEX 1520L for the non-odor-adsorbing sealant layerwere used in film formation and lamination by inflation at 160° C. toprepare a sealant film having a non-odor-adsorbing layer (10μm)/odor-adsorbing layer (30 μm)/non-odor-adsorbing layer (10 μm)3-layer configuration.

Subsequently, dry lamination adhesive 1 was applied to thecorona-treated side of PET film 1 such that the amount of coating afterdrying was 3.5 g/m². After drying at 70° C., aluminum foil 1 waslaminated thereonto by the dry lamination method to obtain a laminateprecursor.

Then, adhesive 1 for the non-odor-adsorbing adhesion layer was appliedonto the aluminum foil 1 side of the laminate precursor such that theamount of coating after drying was 3.5 g/m². The adhesive was dried at70° C. Subsequently, the sealant film having a 3-layer configurationobtained as described above was laminated onto the dry laminationadhesive 1 side to obtain an odor-adsorbing laminate.

The layer configuration of the obtained odor-adsorbing laminate is asdescribed below. The detailed layer configuration and evaluation resultsare shown in Table 5. PET film 1 (12 μm)/adhesion layer (3.5g/m²)/aluminum foil 1 (7 μm)/non-odor-adsorbing adhesion layer (3.5g/m²)/non-odor-adsorbing layer (10 μm)/odor-adsorbing layer (30μm)/non-odor-adsorbing layer (10 μm)

Examples 2 to 8 and 10 to 12

Each sealant film was obtained by the same operation as in Example 1except that the resin for the non-odor-adsorbing sealant layer and theodor-adsorbing sealant layer resin composition were changed as describedin Table 5.

Subsequently, each laminate precursor was obtained by the same operationas in Example 1.

Then, the non-odor-adsorbing adhesion layer was formed on the laminateprecursor by the same operation as in Example 1, and the sealant filmobtained as described above was laminated thereonto to obtain anodor-adsorbing laminate. The detailed layer configuration and evaluationresults are shown in Tables 5 and 6.

Example 9

A sealant film was obtained by the same operation as in Example 1 exceptthat the sealant film had a single-layered configuration consisting ofonly the odor-adsorbing sealant layer (50 μm) using only odor-adsorbingsealant layer resin composition 9.

Subsequently, a laminate precursor was prepared by the same operation asin Example 1. The non-odor-adsorbing adhesion layer was formed thereon,and the sealant film obtained as described above was laminated thereontoto obtain an odor-adsorbing laminate. The detailed layer configurationand evaluation results are shown in Table 6.

Example 13

First, a sealant film was obtained by the same operation as in Example 1except that the odor-adsorbing sealant layer resin composition 1 waschanged to odor-adsorbing sealant layer resin composition 2.

Subsequently, a laminate precursor was prepared by the same operation asin Example 1.

Then, adhesion layer resin composition 1 for dry lamination for theodor-adsorbing adhesion layer was applied onto the aluminum foil 1 sideof the obtained laminate precursor such that the amount of coating afterdrying was 3.5 g/m². The resin composition was dried at 70° C.

Subsequently, the sealant film obtained as described above was laminatedonto the adhesion layer resin composition 1 side to obtain anodor-adsorbing laminate. The detailed layer configuration and evaluationresults are shown in Table 5.

Examples 14 to 16 and Comparative Example 3

Each odor-adsorbing laminate was obtained by the same operation as inExample 11 except that the adhesion layer resin composition 1 waschanged to adhesion layer resin compositions 2 to 5 according to thecombination described in Table 5. The detailed layer configuration andevaluation results are shown in Table 6.

Examples 17 to 23

Each odor-adsorbing laminate was obtained by the same operation as inExample 11 except that the odor-adsorbing adhesion layer was laminatedusing adhesion layer resin compositions 6 to 11 for extrusion insteadsuch that the layer thickness was 15 The detailed layer configurationand evaluation results are shown in Tables 7 and 8.

Example 24

An odor-adsorbing laminate was obtained by the same operation as inExample 23 except that the sealant layer was only a 50 μm thicknon-odor-adsorbing sealant layer consisting of ULT-ZEX 1520L. Thedetailed layer configuration and evaluation results are shown in Table8.

Comparative Example 1

A sealant film consisting of a single layer of only a non-odor-adsorbingsealant layer consisting of ULT-ZEX 1520L was prepared.

Subsequently, a laminate precursor was obtained by the same operation asin Example 1.

Then, an odor-adsorbing laminate was obtained by the same operation asin Example 1. The detailed layer configuration and evaluation resultsare shown in Table 8.

Comparative Example 2

A sealant film consisting of a single layer of only an odor-adsorbingsealant layer consisting of odor-adsorbing sealant layer resincomposition 12 was prepared.

Subsequently, a laminate precursor was obtained by the same operation asin Example 1.

Then, an odor-adsorbing laminate was obtained by the same operation asin Example 1. The detailed layer configuration and evaluation resultsare shown in Table 8.

<Evaluation Method>

[Heat Sealing Properties]

The odor-adsorbing laminate prepared in each Example or ComparativeExample was cut into a size of 10 cm×10 cm, which was then folded andoverlaid in half. A 1 cm×10 cm region was heat-sealed using a heat sealtester (manufactured by Tester Sangyo Co., Ltd.; TP-701-A) withoutheat-sealing and adhesively bonding an end part to prepare a sample in abiforked state.

This sample was cut into 15 mm wide strips. The biforked end part ofeach strip was attached to a tensile tester, and the tensile strength(N/15 mm) was measured and accepted or rejected.

(Heat Sealing Conditions)

Temperature: 160° C.

Pressure: 1 kgf/cm²

Time: 1 sec

(Tensile Strength Test Conditions)

Testing rate: 300 mm/min

Load range: 50 N

(Acceptation and Rejection Criteria)

Good (indicated by circle): 30 N/15 mm or more, accepted.

Poor (indicated by x-mark): Less than 30 N/15 mm, rejected.

[Change in Taste and Odor]

The odor-adsorbing laminate obtained in each Example or ComparativeExample was used to prepare a pouch bag (13 cm×17 cm). The inner face ofeach laminate was subjected to disinfection treatment by UV irradiationin advance.

Each package thus obtained was hot-packed with 100 g of water(manufactured by Suntory Holdings Ltd., Minami Alps no Tennensui) of 65°C. to prepare a liquid-packed package, which was then stored at 10° C.for 1 week. Then, sensory evaluation was conducted as to change in tasteand odor.

The evaluation index is as described below. The number of participantsin the sensory evaluation experiment was 5, and an average value wascalculated and used as evaluation results.

1: Taste and odor were heavy.

2: Taste and odor were slightly lessened.

3: Taste and odor were drastically lessened.

4: Taste and odor were equivalent to those of water before packing.

TABLE 5 Example Material Name Unit 1 2 3 4 5 6 7 Base material PET Film1 μm 12 12 12 12 12 12 12 layer Adhesive Layer Non-odor- Dry laminationadhesive 1 g/m² 3.5 3.5 3.5 3.5 3.5 3.5 3.5 adsorbing adhesion layerFunctional layer Al foil μm 7 7 7 7 7 7 7 Adhesive Layer Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 3.5 3.5 3.5 3.5 3.5 adsorbingadhesion layer Odor-adsorbing Dry Adhesion 1 g/m² adhesion layerlaminate layer 2 g/m² resin 3 g/m² composition 4 g/m² 5 g/m² 6 g/m²Extrusion Adhesion 7 μm coat layer 8 μm resin 9 μm composition 10 μm 11μm 12 μm Sealant Non-odor- Ultzex1520L μm 10 10 10 10 10 10 layeradsorbing Ultzex2021L μm 10 sealant layer Ultzex3520L μm Odor- Odor- 1μm 30 adsorbing adsorbing 2 μm 30 sealant sealant 3 μm 30 layer layer 4μm 30 resin 5 μm 30 composition 6 μm 30 7 μm 30 8 μm 9 μm 10 μm 11 μm 12μm Non-odor- Ultzex1520L μm 10 10 10 10 10 10 adsorbing Ultzex2021L μm10 sealant layer Ultzex3520L μm Characteristics Content of theHydrophobic zeolite % by 0 0 0 0 0 0 0 odor adsorbent Chemicaladsorbent- mass material in the supported inorganic porous % by 0 0 0 00 0 0 adhesion layer material mass Total % by 0 0 0 0 0 0 0 mass Contentof the Hydrophobic zeolite % by 0.3 0.3 0.3 0.3 0.22 0.09 0.3 odoradsorbent Chemical adsorbent- mass material in the supported inorganicporous % by 0 0 0 0 0.09 0.22 0 sealant layer material mass Total % by0.3 0.3 0.3 0.3 0.31 0.31 0.3 mass Evaluation Sealing strength — ◯ ◯ ◯ ◯◯ ◯ ◯ Result Change in odor and taste — 3 3.5 3.5 3.5 3.5 3 3.5

TABLE 6 Example Material Name Unit 8 9 10 11 12 13 14 15 Base materialPET Film 1 μm 12 12 12 12 12 12 12 12 layer Adhesive Layer Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 3.5 3.5 35 3.5 3.5 3.5 adsorbingadhesion layer Functional layer Al foil μm 7 7 7 7 7 7 7 7 Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 3.5 3.5 3.5 adsorbing adhesion layerOdor-adsorbing Dry Adhesion 1 g/m² 3.5 adhesion layer laminate layer 2g/m² 3.5 resin 3 g/m² 3.5 composition 4 g/m² 5 g/m² 6 g/m² ExtrusionAdhesion 7 μm coat layer 8 μm resin 9 μm composition 10 μm 11 μm 12 μmSealant Non-odor- Ultzex1520L μm 2.5 10 10 10 10 10 layer adsorbingUltzex2021L μm sealant layer Ultzex3520L μm 10 Odor- Odor- 1 μmadsorbing adsorbing 2 μm 30 30 30 sealant sealant 3 μm layer layer 4 μmresin 5 μm composition 6 μm 7 μm 30 8 μm 50 9 μm 45 10 μm 30 11 μm 12 μm30 Non-odor- Ultzex1520L μm 2.5 10 10 10 10 10 adsorbing Ultzex2021L μmsealant layer Ultzex3520L μm 10 Characteristics Content of theHydrophobic zeolite % by 0 0 0 0 0 10.0 10.0 10.0 odor adsorbentChemical adsorbent- mass material in the supported inorganic porous % by0 0 0 0 0 0 0 0 adhesion layer material mass Total % by 0 0 0 0 0 10.010.0 10.0 mass Content of the Hydrophobic zeolite % by 1.0 0.83 15 2.42.0 1.0 1.0 1.0 odor adsorbent Chemical adsorbent- mass material in thesupported inorganic porous % by 0 0 0 3.4 8.0 0 0 0 sealant layermaterial mass Total % by 1.0 0.83 15 5.8 10.0 1.0 1.0 1.0 massEvaluation Sealing strength — ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ Result Change in odor andtaste — 3.5 3 4 4 4 3.5 4 4

TABLE 7 Example Material Name Unit 16 17 18 19 20 21 22 Base materialPET Film 1 μm 12 12 12 12 12 12 12 layer Adhesive Layer Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 3.5 3.5 3.5 3.5 3.5 adsorbingadhesion layer Functional layer Al foil μm 7 7 7 7 7 7 7 Adhesive LayerNon-odor- Dry lamination adhesive 1 g/m² adsorbing adhesion layerOdor-adsorbing Dry Adhesion 1 g/m² adhesion layer laminate layer 2 g/m²resin 3 g/m² composition 4 g/m² 3.5 5 g/m² 3.5 6 g/m² Extrusion Adhesion7 μm 15 coat layer 8 μm 15 resin 9 μm 15 composition 10 μm 15 11 μm 1512 μm Sealant Non-odor- Ultzex1520L μm 10 10 10 10 10 10 layer adsorbingUltzer2021L μm sealant layer Ultzex3520L μm Odor- Odor- 1 μm adsorbingadsorbing 2 μm 30 30 30 30 30 30 30 sealant sealant 3 μm layer layer 4μm resin 5 μm composition 6 μm 7 μm 8 μm 9 μm 10 μm 11 μm 12 μmNon-odor- Ultzex1520L μm 10 10 10 10 10 10 10 adsorbing Ultzex2021L μmsealant layer Ultzex3520L μm Characteristics Content of the Hydrophobiczeolite % by 7.5 47 1.67 1.67 1.67 1.67 15 odor adsorbent Chemicaladsorbent- mass material in the supported inorganic porous % by 2.5 0 00 0 1.67 0 adhesion layer material mass Total % by 10.0 47 1.67 1.671.67 3.34 15 mass Content of the Hydrophobic zeolite % by 1.0 1.0 1.01.0 1.0 1.0 1.25 odor adsorbent Chemical adsorbent- mass material in thesupported inorganic porous % by 0 0 0 0 0 0 0 sealant layer materialmass Total % by 1.0 1.0 1.0 1.0 1.0 1.0 1.25 mass Evaluation Sealingstrength — ◯ ◯ ◯ ◯ ◯ ◯ ◯ Result Change in odor and taste — 4 4 4 4 4 4 4

TABLE 8 Example Comparative example Material Name Unit 23 24 1 2 3 Basematerial PET Film 1 μm 12 12 12 12 12 layer Adhesive Layer Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 3.5 3.5 3.5 adsorbing adhesion layerFunctional layer Al foil μm 7 7 7 7 7 Adhesive Layer Non-odor- Drylamination adhesive 1 g/m² 3.5 3.5 adsorbing adhesion layerOdor-adsorbing Dry Adhesion 1 g/m² adhesion layer laminate layer 2 g/m²resin 3 g/m² composition 4 g/m² 5 g/m² 6 g/m² 3.5 Extrusion Adhesion 7μm coat layer 8 μm resin 9 μm composition 10 μm 11 μm 12 μm 15 15Sealant Non-odor- Ultzex1520L μm 10 50 50 10 layer adsorbing Ultzex2021Lμm sealant layer Ultzex3520L μm Odor- Odor- 1 μm adsorbing adsorbing 2μm 30 30 sealant sealant 3 μm layer layer 4 μm resin 5 μm composition 6μm 7 μm 8 μm 9 μm 10 μm 11 μm 12 μm 50 Non-odor- Ultzex1520L μm 10 10adsorbing Ultzex2021L μm sealant layer Ultzex3520L μm Hydrophobiczeolite % by 5.3 5.3 0 0 53 Characteristics Content of the Chemicaladsorbent- mass 5.3 5.3 0 0 0 odor adsorbent supported inorganic porous% by material in the material mass adhesion layer Total % by 10.6 10.6 00 53 mass Hydrophobic zeolite % by 1.0 0 0 17 1.0 Content of theChemical adsorbent- mass odor adsorbent supported inorganic porous % by0 0 0 0 0 material in the material mass sealant layer Total % by 1.0 0 017 1.0 mass Evaluation Sealing strength — ◯ ◯ ◯ X X Result Change inodor and taste — 4 4 1 4 4

<Summary of Results>

The packages of all Examples to which the sealant film and the adhesionlayer (extrusion coating layer and dry lamination layer) supplementedwith the odor adsorbent were applied produced favorable heat sealingproperties and sensory evaluation results.

Comparative Example 1 involving no odor adsorbent material was notimproved in sensory evaluation results, though heat sealing propertieswere favorable. Comparative Examples 2 and 3 using the sealant film andthe adhesion layer (extrusion coating layer and dry lamination layer)containing an excess of the odor adsorbent material tended to worsenheat sealing properties, though sensory evaluation results werefavorable.

Object 4 EXAMPLES

The detailed raw materials used in Examples are as described below.

[Low Elutable Polyethylene for Inner Layer Film and Outer Layer Film andGeneral-Purpose Polyethylene]

TABLE 1 Poly- Type of MFR Elution ethylene Poly- Density [g/10 propertyNo Supplier ethylene [g/cm³] minutes] Low Ultzex1520L Prime Polymer C6-0.916 2.3 elution Co., Ltd. LLDPE property Ultzex2021L Prime Polymer C6-0.920 2.0 Co., Ltd. LLDPE Ultzex3520L Prime Polymer C6- 0.931 2.1 Co.,Ltd. LLDPE Neo- Prime Polymer C4- 0.933 1.6 Zex3510F Co., Ltd. LLDPEGeneral EvolueSP2020 Prime Polymer C6- 0.916 2.1 purpose Co., Ltd. LLDPE

[Resin for Content Spout Resin Composition]

TABLE 2 Poly- Type of MFR Content ethylene Poly- Density [g/10 spout No.Supplier ethylene [g/cm³] minutes] Content Novatec Japan PolyethyleneLLDPE 0.921 16 spout A UF370 Corporation Content Novatec JapanPolyethylene LLDPE 0.925 20 spout B UF580 Corporation Content NovatecJapan Polyethylene LDPE 0.918 23 spout C LJ8041 Corporation ContentNovatec Japan Polyethylene LDPE 0.915 45 spout D LJ902 CorporationContent Novatec Japan Polyethylene HDPE 0.953 5 spout E HJ362NCorporation

[Odor Adsorbent Material]

(Chemical Adsorbent-Supported Inorganic Porous Material)

KESMON NS-241: manufactured by Toagosei Co., Ltd., an aminogroup-containing compound-supported inorganic porous material, averageparticle size: 3.5

(Hydrophobic Zeolite)

MIZUKASIEVES EX-122: manufactured by Mizusawa Industrial Chemicals,Ltd., SiO₂/Al₂O₃ molar ratio=32/1, average particle size: 2.5 to 5.5 μm.

SILTON MT400: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=400/1, average particle size: 5 to 7 μm.

SILTON MT2000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=2000/1, average particle size: 2 to 4 μm.

SILTON MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=8000/1, average particle size: 0.8 μm.

(Hydrophilic Zeolite)

MIZUKASIEVES Y-420: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=5/1, average particle size: 5 μm.

[Others]

EMB-21: manufactured by Sumitomo Chemical Co., Ltd., an antiblockingagent.

PEX ABT-16: Japan Polyethylene Corp., an antiblocking agent.

EMB-10: Sumitomo Chemical Co., Ltd., a slipping agent.

[Preparation of Master Batch]

Each MB (master batch) was prepared as described below.

(Preparation of MB1)

LLDPE ULT-ZEX 1520L as the low elutable polyethylene and hydrophobiczeolite MIZUKASIEVES EX-122 were melt-blended at the followingproportions to obtain master batch 1 (MB1).

ULT-ZEX 1520L 90 parts by mass MIZUKASIEVES EX-122 10 parts by mass

(Preparation of MB2 to MB9)

The raw materials were melt-blended in the same way as in MB1 accordingto the formulation of Table 3, 4 to obtain master batches 2 to 9 (MB2 toMB9).

TABLE 3 MB for inner layer film Unit 1 2 3 4 5 6 7 8 9 ThermoplasticUltzex1520L Parts by 90 90 90 90 90 80 90 80 resin mass Novatec LC600AParts by 90 mass Hydrophobic Mizukasieves EX-122 Parts by 10 zeolitemass Silton MT400  Parts by 10 10 20 10 mass Silton MT2000 Parts by 10mass Silton MT8000 Parts by 10 mass Hydrophilic Mizukasieves Y-420 Partsby 10 zeolite mass Chemical Kesmon NS-241 Parts by 20 adsorbent- masssupported inorganic porous material

[Preparation of Outer Layer Film]

The outer layer films A, B, and C described in Table 4 were prepared.

(Preparation of Outer Layer Film A)

ULT-ZEX 1520L was used in film formation by inflation at 160° C. toprepare 80 μm thick outer layer sealant film A.

(Preparation of Outer Layer Film B)

ULT-ZEX 1520L was used in film formation by inflation at 160° C. toprepare a 40 μm thick sealant film.

Next, biaxially drawn nylon film BONYL RX (15 μm thick, KOHJIN Film &Chemicals Co., Ltd.) as the base material layer and the sealant filmobtained as described above were laminated via LDPE resin (NovatecLC520, Japan Polyethylene Corp.) as an adhesion layer by the extrusioncoating method at 320° C. to obtain outer layer film B having abiaxially drawn nylon film (15 μm)/LDPE (15 μm)/sealant film (40 μm)3-layer configuration.

(Preparation of Outer Layer Film C)

Outer layer film C was obtained by the same operation as in the outerlayer film B except that the base material layer was changed tobiaxially drawn nylon film IB-ONY (15 μm thick, Dai Nippon Printing Co.,Ltd., a gas-barrier drawn nylon film).

TABLE 4 Outer layer film Unit A B C Layer Base material Biaxially drawnBonilRX μm 15 thickness layer nylon film IB-ONY (gas- μm 15 barrier)Adhesion layer LDPE NovatecL C520 μm 15 15 Sealant Non-odor- Low elutionUltzex1520L μm 80 40 40 Layer adsorbing layer polyethylene EvaluationFilm-forming property — ◯ ◯ ◯ result

[Preparation of Content Spout]

Content spout A was prepared by injection molding at 200° C. usingNovatec UF370. Likewise, content spouts B to E were prepared accordingto the description of Table 2.

Example 1

[Preparation of Inner Layer Film]

The following raw materials were melt-kneaded at the followingproportions to prepare a resin composition for the odor-adsorbing layer.

MB1 16.7 parts by mass ULT-ZEX 1520L 83.3 parts by mass

ULT-ZEX 1520L for non-odor-adsorbing layers 1 and 2 and the resincomposition for the odor-adsorbing layer obtained as described abovewere used in film formation and lamination by inflation at 160° C. toobtain a film for the sealant layer having a non-odor-adsorbing layer 1(16 μm)/odor-adsorbing layer (48 μm)/non-odor-adsorbing layer 2 (16 μm)3-layer configuration.

[Preparation and Evaluation of Package]

The inner layer film, the outer layer film A, and the content spoutobtained as described above were used to prepare the package shown inFIG. 16 (size of double-bag portion: 450 mm×450 mm, diameter of contentspout: 31 mm), which was then evaluated for heat sealing properties, bagrupture resistance characteristics, pinhole resistance (inner layerfilm), and increased TOC concentration in filling water. The detailedconfiguration and evaluation results of the package are shown in Table5.

Examples 2 to 14 and Comparative Example 2

Each resin composition for the odor-adsorbing layer was prepared in thesame way as in Example 1 according to the description of Table 5 toobtain a film for the sealant layer. Each package was prepared andevaluated. The detailed configuration and evaluation results of thepackage are shown in Table 5.

Comparative Example 1

LLDPE EVOLUE SP2020 as the general-purpose polyethylene was used insteadof the low elutable polyethylene in film formation by inflation at 160°C. to obtain a sealant film (80 μm) for the inner layer consisting ofonly the non-odor-adsorbing layer. A package was prepared in the sameway as in Example 1 and evaluated. The detailed configuration andevaluation results of the package are shown in Table 5.

Comparative Example 3

A resin composition for the odor-adsorbing layer was prepared in thesame way as in Example 1 according to the description of Table 5 toobtain a film for the sealant layer consisting of only theodor-adsorbing layer. A package was prepared and evaluated. The detailedconfiguration and evaluation results of the package are shown in Table5.

<Evaluation>

[Film Formability]

The appearance of the film was observed and sensorily evaluated. Theevaluation criteria are as described below.

Good (indicated by circle): The film was formable without causingwrinkles or grains on the film.

Poor (indicated by x-mark): The film was difficult to form due to manywrinkles or grains on the film.

[Bag Rupture Resistance Characteristics]

The inside of the package prepared in each Example or ComparativeExample was packed with 10 L of water. The operation of dropping thepackage thus packed with water from a height of 1 m was repeated a totalof three times to evaluate the presence or absence of bag rupture.

Acceptation and Rejection Criteria

Excellent (indicated by double circle): Bag rupture was absent in theevaluation by three drops. Accepted.

Good (indicated by circle): One bag was ruptured in the evaluation bythree drops. Accepted.

Poor (indicated by x-mark): All bags were ruptured in the evaluation bythree drops. Rejected.

[Pinhole Resistance of Single Inner Layer Film]

The prepared inner layer film was cut into A4 size (30 cm×21 cm) andflexed using Gelbo Flex Tester (manufactured by Tester Sangyo Co., Ltd.,BE-1005). Then, the number of pinholes formed within the 30 cm×21 cmplane of each sample was counted. 160 or less pinholes were accepted.

Temperature: 23° C.

The number of Gelbo flexes: 5000

[Pinhole Resistance of Package]

The prepared package was delivered in a packed state for transport as aliquid content package for BIB through an actual transport pathway. Thenumber of pinholes formed in the inner layer film of the bag portion wascounted. 160 or less pinholes were accepted.

[Increased TOC Concentration in Filling Water]

Before preparation of the package in each Example or ComparativeExample, the inner film side of the packaging material constituting thepackage was subjected to disinfection treatment by UV irradiation inadvance.

The package obtained in each Example or Comparative Example washot-packed with 1000 g of water (distilled water for high-performanceliquid chromatography, Junsei Chemical Co., Ltd.) of 65° C. to prepare aliquid-packed package, which was then stored at 35° C. for 2 weeks.Then, the TOC concentration of the filling water was measured usingTOC-L total organic carbon meter manufactured by Shimadzu Corp.

Subsequently, the TOC concentration of the water before packing was alsomeasured in the same way as above.

The increased TOC concentration in each package was measured accordingto the following expression.

Increased TOC concentration=TOC concentration of the filling water afterstorage−TOC concentration of the water before packing

TOC concentration of the water before packing: 0.02 ppm

Conditions of disinfection treatment by UV irradiation

UV wavelength: 253.7 nm

Irradiation time: 10 sec

Temperature: 25° C.

TABLE 5 Example Material Name Unit 1 2 3 4 5 6 7 8 Content Content spoutA — ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ spout Content spout B — Content spout C — Contentspout D — Content spout E — Outer Outer layer film A — ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯layer Outer layer film B — film Outer layer film C — Inner Compo- Odor-MB MB1 Parts by 16.7 layer sition adsorbing mass film layer MB2 Parts by16.7 12.52 4.18 16.7 mass MB3 Parts by 16.7 mass MB4 Parts by 16.7 massMB5 Parts by mass MB6 Parts by 4.18 12.52 mass MB7 Parts by 16.7 massMB8 Parts by mass MB9 Parts by mass Resin Low- Ultrex1520L Parts by 83.383.3 83.3 83.3 83.3 83.3 83.3 elution mass poly- Ultrex2021L Parts by83.3 ethylene mass Ultrex3520L Parts by mass Neozex3510F Parts by massGeneral- EvalueSP2020 Parts by purpose mass poly- ethylene Non- ResinLow- Ultrex1520L Parts by 100 100 100 100 100 100 100 Odor- elution massadsorbing poly- Ultrex2021L Parts by 100 layer ethylene mass Ultrex3520LParts by mass Neozex3510F Parts by mass General- EvalueSP2020 Parts bypurpose mass poly- ethylene Layer Sealant layer Non-odor μm 16 16 16 1616 16 16 16 thick- adsorbing ness layer Odor μm 48 48 48 48 48 48 48 48adsorbing layer Non-odor μm 16 16 16 16 16 16 16 16 adsorbing layerCharac- Polyethylene Increased Article ppm 0.74 0.74 0.74 0.74 0.74 0.740.74 0.51 teristics single film TOC con- unirradiated (Inner layer film)centration in with UV filling water Article ppm 0.80 0.80 0.08 0.08 0.080.08 0.08 0.61 irradiated with UV Pinhole resistance Holes 2 2 2 2 2 2 215 Content of the Hydrophobic Zeolite % by 1 1 1 1 0.75 0.25 1 1 wholesealant mass layer of inner Chemical adsorbant-supported % by — — — —0.25 0.75 — — layer film inorganic porous material mass Hydroph 

 ic Zeolite % by — — — — — — — — mass Evalu- Film-forming properties — ◯◯ ◯ ◯ ◯ ◯ ◯ ◯ ation Bag rupture resistance characteristics — ◯ ◯ ◯ ◯ ◯ ◯◯ ◯ results Pinhole resistance Holes 4 4 3 5 4 4 5 20 Increased TOCconcentration to water ppm 0.68 0. 

  0.44 0.42 0.59 0.67 0.57 0.37 Example Comparative Example MaterialName 9 10 11 12 13 14 1 2 3 Content Content spout A ◯ ◯ ◯ ◯ ◯ spoutContent spout B ◯ Content spout C ◯ Content spout D ◯ Content spout E ◯Outer Outer layer film A ◯ ◯ ◯ ◯ layer Outer layer film B ◯ film Outerlayer film C ◯ Inner Compo- Odor- MB MB1 layer sition adsorbing MB2 16.716.7 8.33 16.7 16.7 film layer MB3 MB4 MB5 16.7 MB6 75 MB7 MB8 83.3 75MB9 Resin Low- Ultrex1520L 16.67 16.7 83.3 83.3 35 elution Ultrex2021Lpoly- Ultrex3520L 83.3 ethylene Neozex3510F 83.3 General- EvalueSP202083.3 purpose poly- ethylene Non- Resin Low- Ultrex1520L 100 100 100Odor- elution Ultrex2021L adsorbing poly- Ultrex3520L 100 layer ethyleneNeozex3510F 100 General- EvalueSP2020 100 100 purpose poly- ethyleneLayer Sealant layer Non-odor 16 16 16 16 16 16 80 16 thick- adsorbingness layer Odor 48 48 48 48 48 48 48 80 adsorbing layer Non-odor 16 1616 16 16 16 16 adsorbing layer Charac- Polyethylene Increased Article0.34 0.41 0.74 0.74 0.74 0.74 2.56 2.56 0.74 teristics single film TOCcon- unirradiated (Inner layer film) centration in with UV filling waterArticle 0.4 0.49 0.80 0.80 0.80 0.80 3.07 3.07 0.08 irradiated with UVPinhole resistance  

 5 120 2 2 2 2 12 12 2 Content of the Hydrophobic Zeolite 1 1 0.5 10 1 10 — 15 whole sealant Chemical adsorbant-supported — — 9 — — — — — —layer of inner inorganic porous material layer film Hydroph 

 ic Zeolite — — — — — — — 1 — Evalu- Film-forming properties ◯ ◯ ◯ ◯ ◯ ◯◯ ◯ X ation Bag rupture resistance characteristics ◯ ◯ ◯ ◯ Δ ◯ ◯ ◯ Xresults Pinhole resistance 106 1 

 5 7 8 4 5 12 21 20 Increased TOC concentration to water 0.24 0.29 0.40.08 0.56 0.54 3.07 2.94 0.05

indicates data missing or illegible when filed

<Summary of Results>

The packages of all Examples exhibited favorable film formability, bagrupture resistance characteristics, heat sealing properties, and pinholeresistance and also had a small increased TOC concentration.

Comparative Example 1 involving none of the low elutable polyethylene,the hydrophobic zeolite, and the chemical adsorbent-supported inorganicporous material, and Comparative Example 2 involving no low elutablepolyethylene and involving hydrophilic zeolite instead of hydrophobiczeolite exhibited a tendency of a high increased TOC concentration.Comparative Example 3 involving too large an amount of hydrophobiczeolite resulted in poor film formability of the inner layer film andpoor heat sealing properties and bag rupture resistance characteristics,though decrease in TOC concentration was large.

Object 5 EXAMPLES

The detailed raw materials used in Examples are as described below.

[Low Elutable Polyethylene for Inner Layer Film and Outer Layer Film andGeneral-Purpose Polyethylene]

TABLE 1 Poly- Type of MFR Elution ethylene Poly- Density [g/10 propertyNo Supplier ethylene [g/cm³] minutes] Low Ultzex1520L Prime Polymer C6-0.916 2.3 elution Co., Ltd. LLDPE property Ultzex2021L Prime Polymer C6-0.920 2.0 Co., Ltd. LLDPE Ultzex3520L Prime Polymer C6- 0.931 2.1 Co.,Ltd. LLDPE Neo-Zex3510F Prime Polymer C4- 0.933 1.6 Co., Ltd. LLDPEGeneral EvolueSP2020 Prime Polymer C6- 0.916 2.1 purpose Co., Ltd. LLDPE

[Resin for Content Spout Resin Composition]

TABLE 2 Type of MFR Polyethylene Poly- Density [g/10 No. Supplierethylene [g/cm³] minutes] Novatec UF370 Japan Polyethylene LLDPE 0.92116 Corporation Novatec UF580 Japan Polyethylene LLDPE 0.925 20Corporation Novatec LJ8041 Japan Polyethylene LDPE 0.918 23 CorporationNovatec LJ902  Japan Polyethylene LDPE 0.915 45 Corporation NovatecHJ362N Japan Polyethylene HDPE 0.953 5 Corporation

[Odor Adsorbent Material]

(Chemical Adsorbent-Supported Inorganic Porous Material)

KESMON NS-241: manufactured by Toagosei Co., Ltd., an aminogroup-containing compound-supported inorganic porous material, averageparticle size: 3.5

(Hydrophobic Zeolite)

MIZUKASIEVES EX-122: manufactured by Mizusawa Industrial Chemicals,Ltd., SiO₂/Al₂O₃ molar ratio=32/1, average particle size: 2.5 to 5.5 μm.

SILTON MT400: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=400/1, average particle size: 5 to 7 μm.

SILTON MT2000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=2000/1, average particle size: 2 to 4 μm.

SILTON MT-8000: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=8000/1, average particle size: 0.8 μm.

(Hydrophilic Zeolite)

MIZUKASIEVES Y-420: manufactured by Mizusawa Industrial Chemicals, Ltd.,SiO₂/Al₂O₃ molar ratio=5/1, average particle size: 5 μm.

[Others]

EMB-21: manufactured by Sumitomo Chemical Co., Ltd., an antiblockingagent.

PEX ABT-16: Japan Polyethylene Corp., an antiblocking agent.

EMB-10: Sumitomo Chemical Co., Ltd., a slipping agent.

[Preparation of Master Batch]

Each MB (master batch) for the outer layer film, the inner layer film,and the content spout resin composition was prepared as described below.

(Preparation of MB1)

LLDPE ULT-ZEX 1520L as the low elutable polyethylene and hydrophobiczeolite MIZUKASIEVES EX-122 were melt-blended at the followingproportions to obtain master batch 1 (MB1).

Novatec LC600A 90 parts by mass

MIZUKASIEVES EX-122 10 parts by mass

(Preparation of MB2 to MB13)

The raw materials were melt-blended in the same way as in MB1 accordingto the formulation of Table 3 or 4 to obtain master batches 2 to 13 (MB2to MB13).

TABLE 3 MB for outer layer film and inner layer film Unit 1 2 3 4 5 6 78 Composition Thermoplastic Novatec LC600A Parts by 90 90 90 90 90 90 80resin mass Ultzex15201 Parts by 90 mass Hydrophobic Mizukasieves EX-122Parts by 10 zeolite mass Silton MT400  Parts by 10 10 20 mass SiltonMT2000 Parts by 10 mass Silton MT8000 Parts by 10 mass HydrophilicMizukasieves Y-420 Parts by 10 zeolite mass Chemical Kesmon NS-241 Partsby 10 adsorbent- mass supported inorganic porous material

TABLE 4 MB for content spout resin composition Unit MB9 MB10 MB11 MB12MB13 Composition Low elution Novatec UF370 Parts by 90 90 90 90 90polyethylene mass (LLDPE) Hydrophobic Mizukasieves EX-122 Parts by 10zeolite mass Silton MT400  Parts by 10 mass Silton MT2000 Parts by 10mass Silton MT8000 Parts by 10 mass Chemical Kesmon NS-241 Parts by 10adsorbent- mass supported inorganic porous material

[Preparation of Outer Layer Film]

(Preparation of Outer Layer Film A)

The following raw materials were melt-kneaded at the followingproportions to prepare a resin composition for the odor-adsorbing layer.

ULT-ZEX 1520L 80 parts by mass MB2 20 parts by mass

ULT-ZEX 1520L for non-odor-adsorbing layers 1 and 2 and the resincomposition for the odor-adsorbing layer obtained as described abovewere used in film formation and lamination by inflation at 160° C. toobtain a film for the sealant layer having a non-odor-adsorbing layer 1(10 μm)/odor-adsorbing layer (20 μm)/non-odor-adsorbing layer 2 (10 μm)3-layer configuration.

The film for the sealant layer obtained as described above and biaxiallydrawn nylon film 1 (KOHJIN Film & Chemicals Co., Ltd., BONYL RX, 15 μmthick) as the base material layer were adhesively bonded via LDPE resin1 (Japan Polyethylene Corp., Novatec LC520) as an adhesion layer by theextrusion coating method at 320° C. to obtain outer layer film A havinga base material layer (15 μm)/adhesion layer (15 μm)/non-odor-adsorbinglayer 1 (10 μm)/odor-adsorbing layer (20 μm)/odor-adsorbing layer 2 (10μm) configuration. The detailed layer configuration is shown in Table 5.

(Preparation of Outer Layer Films B to I)

Each of the base material layer film, the adhesion layer, and thenon-odor-adsorbing layer was provided on the basis of their presence orabsence according to the configuration of each outer layer film shown inTable 5 to prepare a resin composition for the odor-adsorbing layer. Afilm for the sealant layer was prepared by the same operation as in theouter layer film A to prepare outer layer films B to I.

For the outer layer films C, E, and F, the film for the sealant layerconsisting of only the odor-adsorbing layer was used as outer layer filmC, E, F. For the outer layer film I, the film for the sealant layerconsisting of only the non-odor-adsorbing layer was used as outer layerfilm C, E, F.

TABLE 5 Outer layer Film Unit A B C D E F G H I Layer Base materiallayer μm 15 15 15 15 thickness Adhesion layer μm 15 15 15 15 SealantLayer Non-odor-adsorbing layer 1 μm 10 10 80 Odor-adsorbing layer μm 2020 80 40 80 80 40 80 Non-odor-adsorbing layer 2 μm 10 10 Compo- BaseMaterial Biaxially BonilRX — ◯ ◯ ◯ sition layer drawn nylon IB-ONY — ◯film (gas-barrier) Adhesion layer LDPE NovatecLC520 Parts by 100 100 100100 mass Sealant Non-odor- Low-elution Ultzex1520L Parts by 100 100 100Layer adsorbing Polyethylene mass layer 1 Odor- Low-elution Ultzex1520LParts by 80 80 81.5 50 50 50 16.7 16.7 adsorbing Polyethylene mass layerMasterbatch MB2 Parts by 20 20 16.7 mass MB6 Parts by 40 mass MB8 Partsby 50 50 10 83.3 83.3 mass Slipping agent EMB-10 Parts by 1 added MBmass Antiblocking PEX ABT-16 Parts by 0.8 agent mass added MB Non-odor-Low-elution Ultzex1520L Parts by 100 100 adsorbing Polyethylene masslayer 2 Character- Polyethylene Increased TOC Article unirradiated ppm0.74 0.74 0.74 0.74 0.74 0.74 0.74 0.74 0.74 istics single filmconcentration with UV in filling water Article irradiated ppm 0.88 0.880.88 0.88 0.88 0.88 0.88 0.88 0.88 with UV Content in HydrophobicZeolite % by 1 1 1.7 10 10 2 16.7 16.7 0 the whole mass sealant Chemicaladsorbent-supported % by 0 0 0 0 0 8 0 0 0 film inorganic porousmaterial mass Evaluation Film-forming properties — ◯ ◯ ◯ ◯ ◯ ◯ X X ◯result

[Preparation of Inner Layer Film]

(Preparation of Inner Layer Film A)

The following raw materials were melt-kneaded at the followingproportions to prepare a resin composition for the odor-adsorbing layer.

ULT-ZEX 1520L 83.3 parts by mass MB1 16.7 parts by mass

ULT-ZEX 1520L for non-odor-adsorbing layers c and d and the resincomposition for the odor-adsorbing layer obtained as described abovewere used in film formation and lamination by inflation at 160° C. toobtain inner layer film A consisting of only a sealant layer having anon-odor-adsorbing layer c (16 μm)/odor-adsorbing layer (48μm)/non-odor-adsorbing layer d (16 μm) 3-layer configuration. Thedetails are shown in Table 6.

(Preparation of Inner Layer Films B to P)

Each resin composition for the odor-adsorbing layer was preparedaccording to the configuration of each inner layer film shown in Table6, and a resin for the non-odor-adsorbing layer was selected. Innerlayer films B to 0 were prepared by the same operation as in the innerlayer film A.

The inner layer film M was prepared using only the non-odor-adsorbinglayer, and the inner layer film O was prepared using only theodor-adsorbing layer.

TABLE 6 Inner layer film Unit A B C D E F G H I J K L M N O P LayerSealant Layer Non-odor-adsorbing layer c μm 16 16 16 16 16 16 16 16 1616 16 16 16 80 16 thickness Odor-adsorbing layer μm 48 48 48 48 48 48 4848 48 48 48 48 48 48 80 Non-odor-adsorbing layer d μm 16 16 16 16 16 1616 16 16 16 16 16 16 16 Composition Sealant Non-odor- Low-elutionUltzex1520L Parts by 100 100 100 100 100 100 100 100 100 Layer adsorbinglayer polyethylene mass c, d Ultzex2021L Parts by 100 mass Ultzex3520LParts by 100 mass Neozex3510F Parts by 100 mass General-purposeEvalueSP2020 Parts by 100 100 polyethylene mass Odor-adsorbingLow-elution Ultzex1520L Parts by 83.3 83.3 83.3 83.3 83.3 83.3 83.391.67 16.7 16.7 25 layer polyethylene mass Ultzex2021L Parts by 83.3mass Ultzex3520L Parts by 83.3 mass Neozex3510F Parts by 83.3 massGeneral-purpose EvalueSP2020 Parts by 100 83.3 polyethylene mass MB MB1Parts by 16.7 mass MB2 Parts by 16.7 12.52 4.18 16.7 16.7 16.7 8.33 massMB3 Parts by 16.7 mass MB4 Parts by 16.7 mass MB5 Parts by 16.7 mass MB6Parts by 4.18 12.52 67 mass MB7 Parts by 16.7 mass MB8 Parts by 83.316.3 75 mass Characteristics Polyethylene single film Increased TOCArticle unirradiated with UV ppm 0.74 0.74 0.74 0.74 0.74 0.74 0.74 0.510.34 0.41 0.74 0.74 0.74 2.56 2.56 0.74 concentration in Articleirradiated with UV ppm 0.88 0.88 0.88 0.88 0.88 0.88 0.88 0.61 0.4 0.490.88 0.88 0.88 3.07 3.07 0.88 filling water Pinhole resistance Holes 2 22 2 2 2 2 15 95 120 2 20 22 12 14 35 Content of the whole Chemicaladsorbant-supported inorganic % by 0 0 0 0 0.25 0.75 0 0 0 0 0 0 8 0 0 0sealant film porous material mass Hydrophobic Zeolite % by 1 1 1 1 0.750.25 1 1 1 1 0.5 10 2 0 0 15 mass Evaluation Film-forming properties — ◯◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ X results

[Preparation of Content Spout]

The raw materials were dry-blended at the proportions shown in Table 7to prepare resin compositions A to J for the content spout.

Then, each resin composition obtained as described above wasinjection-molded at 200° C. to prepare content spouts A to J.

TABLE 7 Content spout Unit A B C D E F G H I J Composition MB MB9  Partsby 10 of resin mass composition MB10 Parts by 10 7.5 10 10 10 10 massMB11 Parts by 10 mass MB12 Parts by 10 mass MB13 Parts by 2.5 mass ResinNovatecUF370 Parts by 90 90 90 90 90 100 component mass NovatecUFS80Parts by 90 mass NovatecLJ8041 Parts by 90 mass NovatecLJ902 Parts by 90mass NovatecHJ362N Parts by 90 mass Characteristics Content of chemicaladsorbent- % by 0 0 0 0 0.25 0 0 0 0 0 supported inorganic porousmaterial mass Content of hydrophobic zeolite % by 1 1 1 1 0.75 1 1 1 1 0mass Evaluation Moldability — ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ ◯ results

Example 1

The outer layer film A, the inner layer film A, and the content spout Aobtained as described above were used to prepare the package shown inFIG. 16 (size of double-bag portion: 450 mm×450 mm, diameter of contentspout A: 31 mm), which was then evaluated for heat sealing properties,bag rupture resistance characteristics, pinhole resistance (inner layerfilm), and increased TOC concentration in filling water.

The detailed configuration and evaluation results of the laminate areshown in Table 8.

Examples 2 to 25 and Comparative Examples 2 to 5

Each mixture for the odor-adsorbing layer was obtained in the same wayas in Example 1 according to the formulation described in Table 3, andeach sealant film was prepared and evaluated.

The detailed configurations and evaluation results of the laminate areshown in Tables 8 to 10.

Comparative Example 1

LLDPE EVOLUE SP2020 as the high elutable polyethylene was used in filmformation by inflation at 160° C. to obtain a sealant film (80 μm) forthe inner layer.

A molded article was prepared by injection molding at 200° C. usingNovatec UF370.

Subsequently, evaluation was conducted in the same way as in Example 1.The detailed configuration and evaluation results of the laminate areshown in Table 5.

<Evaluation>

[Film Formability]

The appearance was observed and sensorily evaluated. The evaluationcriteria are as described below.

Good (indicated by circle): The film was formable without causingwrinkles or grains on the film.

Poor (indicated by x-mark): The film was difficult to form due to manywrinkles or grains on the film.

[Bag Rupture Resistance Characteristics]

The inside of the package prepared in each Example or ComparativeExample was packed with 10 L of water. The operation of dropping thepackage thus packed with water from a height of 1 m was repeated a totalof three times to evaluate the presence or absence of bag rupture.

Acceptation and Rejection Criteria

Excellent (indicated by double circle): Bag rupture was absent in theevaluation by three drops. Accepted.

Good (indicated by circle): One bag was ruptured in the evaluation bythree drops. Accepted.

Poor (indicated by x-mark): All bags were ruptured in the evaluation bythree drops. Rejected.

[Pinhole Resistance of Single Inner Layer Film]

The prepared inner layer film was cut into A4 size (30 cm×21 cm) andflexed using Gelbo Flex Tester (manufactured by Tester Sangyo Co., Ltd.,BE-1005). Then, the number of pinholes formed within the 30 cm×21 cmplane of each sample was counted. 160 or less pinholes were accepted.

Temperature: 23° C.

The number of Gelbo flexes: 5000

[Pinhole Resistance of Package]

The prepared package was delivered in a packed state for transport as aliquid content package for BIB through an actual transport pathway. Thenumber of pinholes formed in the inner layer film of the bag portion wascounted. 160 or less pinholes were accepted.

[Increased TOC Concentration in Filling Water]

Before preparation of the package in each Example or ComparativeExample, the inner film side of the packaging material constituting thepackage was subjected to disinfection treatment by UV irradiation inadvance.

The package obtained in each Example or Comparative Example washot-packed with 1000 g of water (distilled water for high-performanceliquid chromatography, Junsei Chemical Co., Ltd.) of 65° C. to prepare aliquid-packed package, which was then stored at 35° C. for 2 weeks.Then, the TOC concentration of the filling water was measured usingTOC-L total organic carbon meter manufactured by Shimadzu Corp.

Subsequently, the TOC concentration of the water before packing was alsomeasured in the same way as above.

The increased TOC concentration in each package was measured accordingto the following expression.

Increased TOC concentration=TOC concentration of the filling water afterstorage−TOC concentration of the water before packing

TOC concentration of the water before packing: 0.02 ppm

Conditions of disinfection treatment by UV irradiation

UV wavelength: 253.7 nm

Irradiation time: 10 sec

Temperature: 25° C.

TABLE 8 Example Unit 1 2 3 4 5 Packaging Outer layer film — A A A A Amaterial Inner layer film — A B C D E consti- Content spout — A A A A Atution Character- Outer Poly- Increased Article un- ppm 0.74 0.74 0.740.74 0.74 istics layer ethylene TOC con- irradiated film singlecentration with UV film in filling Article ppm 0.88 0.88 0.88 0.88 0.88water irradiated with UV Content Chemical adsorbent- % by 0 0 0 0 0 inthe supported inorganic mass whole porous material sealant HydrophobicZeolite % by 1 1 1 1 1 film mass Inner Poly- Increased Article un- ppm0.74 0.74 0.74 0.74 0.74 layer ethylene TOC con- irradiated film singlecentration with UV film in filling Article ppm 0.88 0.88 0.88 0.88 0.88water irradiated with UV Pinhole resistance Holes 2 2 2 2 2 ContentChemical adsorbent- % by 0 0 0 0 0.25 in the supported inorganic masswhole porous material sealant Hydrophobic Zeolite % by 1 1 1 1 0.75 filmmass Content Content Chemical adsorbent- % by 0 0 0 0 0 spout in thesupported inorganic mass whole porous material molded HydrophobicZeolite % by 1 1 1 1 1 article mass Evalu- Package Film-forming Outer —◯ ◯ ◯ ◯ ◯ ation (Outer properties layer film result layer Inner — ◯ ◯ ◯◯ ◯ film + layer film Inner Moldability Content — ◯ ◯ ◯ ◯ ◯ layerproperties spout film + Heat sealing strength — ◯ ◯ ◯ ◯ ◯ Content Bagrupture resistance — ⊚ ⊚ ⊚ ⊚ ⊚ spout) characteristics Pinhole resistanceHoles 4 4 3 5 4 (Inner layer film) Increased TOC concentration ppm 0.550.44 0.36 0.34 0.48 in filling water Example 6 7 8 9 10 Packaging Outerlayer film A A A A A material Inner layer film F G H I J consti- Contentspout A A A A A tution Character- Outer Poly- Increased Article un- 0.740.74 0.74 0.74 0.74 istics layer ethylene TOC con- irradiated filmsingle centration with UV film in filling Article 0.88 0.88 0.88 0.880.88 water irradiated with UV Content Chemical adsorbent- 0 0 0 0 0 inthe supported inorganic whole porous material sealant HydrophobicZeolite 1 1 1 1 1 film Inner Poly- Increased Article un- 0.74 0.74 0.510.34 0.41 layer ethylene TOC con- irradiated film single centration withUV film in filling Article 0.88 0.88 0.61 0.4 0.49 water irradiated withUV Pinhole resistance 2 2 15 95 120 Content Chemical adsorbent- 0.75 0 00 0 in the supported inorganic whole porous material sealant HydrophobicZeolite 0.25 1 1 1 1 film Content Content Chemical adsorbent- 0 0 0 0 0spout in the supported inorganic whole porous material moldedHydrophobic Zeolite 1 1 1 1 1 article Evalu- Package Film-forming Outer◯ ◯ ◯ ◯ ◯ ation (Outer properties layer film result layer Inner ◯ ◯ ◯ ◯◯ film + layer film Inner Moldability Content ◯ ◯ ◯ ◯ ◯ layer propertiesspout film + Heat sealing strength ◯ ◯ ◯ ◯ ◯ Content Bag ruptureresistance ⊚ ⊚ ⊚ ⊚ ⊚ spout) characteristics Pinhole resistance 4 5 20106 135 (Inner layer film) Increased TOC concentration 0.54 0.46 0.300.19 0.23 in filling water

TABLE 9 Example Unit 11 12 13 14 15 Packaging Outer layer film — A A A AA material Inner layer film — K L B B B consti- Content spout — A A B CD tution Character- Outer Poly- Increased Article un- ppm 0.74 0.74 0.740.74 0.74 istics layer ethylene TOC con- irradiated film singlecentration with UV film in filling Article ppm 0.88 0.88 0.88 0.88 0.88water irradiated with UV Content Chemical adsorbent- % by 0 0 0 0 0 inthe supported inorganic mass whole porous material sealant HydrophobicZeolite % by 1 1 1 1 1 film mass Inner Poly- Increased Article un- ppm0.74 0.74 0.74 0.74 0.74 layer ethylene TOC con- irradiated film singlecentration with UV film in filling Article ppm 0.88 0.88 0.88 0.88 0.88water irradiated with UV Pinhole resistance Holes 2 20 2 2 2 ContentChemical adsorbent- % by 0 0 0 0 0 in the supported inorganic mass wholeporous material sealant Hydrophobic Zeolite % by 0.5 10 1 1 1 film massContent Content Chemical adsorbent- % by 0 0 0 0 0 spout in thesupported inorganic mass whole porous material molded HydrophobicZeolite % by 1 1 1 1 1 article mass Evalu- Package Film-forming Outer —◯ ◯ ◯ ◯ ◯ ation (Outer properties layer film result layer Inner — ◯ ◯ ◯◯ ◯ film + layer film Inner Moldability Content — ◯ ◯ ◯ ◯ ◯ layerproperties spout film + Heat sealing strength — ◯ ◯ ◯ ◯ ◯ Content Bagrupture resistance — ⊚ ◯ ⊚ ⊚ ⊚ spout) characteristics Pinhole resistanceHoles 3 25 5 4 5 (Inner layer film) Increased TOC concentration ppm 0.570.06 0.55 0.52 0.51 in filling water Example 16 17 18 19 20 PackagingOuter layer film A A A A A material Inner layer film B B B B B consti-Content spout E F G H I tution Character- Outer Poly- Increased Articleun- 0.74 0.74 0.74 0.74 0.74 istics layer ethylene TOC con- irradiatedfilm single centration with UV film in filling Article 0.88 0.88 0.880.88 0.88 water irradiated with UV Content Chemical adsorbent- 0 0 0 0 0in the supported inorganic whole porous material sealant HydrophobicZeolite 1 1 1 1 1 film Inner Poly- Increased Article un- 0.74 0.74 0.510.34 0.41 layer ethylene TOC con- irradiated film single centration withUV film in filling Article 0.88 0.88 0.88 0.88 0.88 water irradiatedwith UV Pinhole resistance 2 2 2 2 2 Content Chemical adsorbent- 0 0 0 00 in the supported inorganic whole porous material sealant HydrophobicZeolite film Content Content Chemical adsorbent- 0.75 1 1 1 1 spout inthe supported inorganic whole porous material molded Hydrophobic Zeolitearticle Evalu- Package Film-forming Outer ◯ ◯ ◯ ◯ ◯ ation (Outerproperties layer film result layer Inner ◯ ◯ ◯ ◯ ◯ film + layer filmInner Moldability Content ◯ ◯ ◯ ◯ ◯ layer properties spout film + Heatsealing strength ◯ ◯ ◯ ◯ ◯ Content Bag rupture resistance ⊚ ⊚ ⊚ ⊚ ⊚spout) characteristics Pinhole resistance 5 4 3 5 4 (Inner layer film)Increased TOC concentration 0.53 0.56 0.55 0.57 0.55 in filling water

TABLE 10 Example Unit 21 22 23 24 25 Packaging Outer layer film — B C DE F material Inner layer film — B B B B M consti- Content spout — B B BB B tution Character- Outer Poly- Increased Article un- ppm 0.74 0.740.74 0.74 0.74 istics layer ethylene TOC con- irradiated film singlecentration with UV film in filling Article ppm 0.88 0.88 0.88 0.88 0.88water irradiated with UV Content Chemical adsorbent- % by 0 0 0 0 8 inthe supported inorganic mass whole porous material sealant HydrophobicZeolite % by 1 1.7 10 10 2 film mass Inner Poly- Increased Article un-ppm 0.74 0.74 0.74 0.74 0.74 layer ethylene TOC con- irradiated filmsingle centration with UV film in filling Article ppm 0.88 0.88 0.880.88 0.88 water irradiated with UV Pinhole resistance Holes 2 2 2 2 22Content Chemical adsorbent- % by 0 0 0 0 8 in the supported inorganicmass whole porous material sealant Hydrophobic Zeolite % by 1 1 1 1 2film mass Content Content Chemical adsorbent- % by 0 0 0 0 0 spout inthe supported inorganic mass whole porous material molded HydrophobicZeolite % by 1 1 1 1 1 article mass Evalu- Package Film-forming Outer —◯ ◯ ◯ ◯ ◯ ation (Outer properties layer film result layer Inner — ◯ ◯ ◯◯ ◯ film + layer film Inner Moldability Content — ◯ ◯ ◯ ◯ ◯ layerproperties spout film + Heat sealing strength — ◯ ◯ ◯ ◯ ◯ Content Bagrupture resistance — ⊚ ⊚ ◯ ◯ ◯ spout) characteristics Pinhole resistanceHoles 4 5 5 4 26 (Inner layer film) Increased TOC concentration ppm 0.460.47 0.44 0.46 0.41 in filling water Comparative Example 1 2 3 4 5Packaging Outer layer film A A A G H material Inner layer film N O P P Pconsti- Content spout J B B B B tution Character- Outer Poly- IncreasedArticle un- 0.74 0.74 0.74 0.74 0.74 istics layer ethylene TOC con-irradiated film single centration with UV film in filling Article 0.880.88 0.88 0.88 0.88 water irradiated with UV Content Chemical adsorbent-0 0 0 0 0 in the supported inorganic whole porous material sealantHydrophobic Zeolite 1 1 1 16.7 16.7 film Inner Poly- Increased Articleun- 2.56 2.56 0.74 0.74 0.74 layer ethylene TOC con- irradiated filmsingle centration with UV film in filling Article 3.07 3.07 0.88 0.880.88 water irradiated with UV Pinhole resistance 12 14 35 35 35 ContentChemical adsorbent- 0 0 0 0 0 in the supported inorganic whole porousmaterial sealant Hydrophobic Zeolite 0 0 15 16 17 film Content ContentChemical adsorbent- 0 0 0 0 0 spout in the supported inorganic wholeporous material molded Hydrophobic Zeolite 0 1 1 1 1 article Evalu-Package Film-forming Outer ◯ ◯ ◯ X X ation (Outer properties layer filmresult layer Inner ◯ ◯ X X X film + layer film Inner Moldability Content◯ ◯ ◯ ◯ ◯ layer properties spout film + Heat sealing strength ◯ ◯ X X XContent Bag rupture resistance ⊚ ⊚ X X X spout) characteristics Pinholeresistance 12 24 340 340 340 (Inner layer film) Increased TOCconcentration 2.61 2.37 0.04 0.02 0.02 in filling water

<Summary of Results>

The packages of all Examples exhibited favorable film formability, bagrupture resistance characteristics, heat sealing properties, and pinholeresistance and also had a small increased TOC concentration.

Comparative Example 1 involving none of the low elutable polyethylene,the hydrophobic zeolite, and the chemical adsorbent-supported inorganicporous material, and Comparative Example 2 involving no low elutablepolyethylene and involving hydrophilic zeolite instead of hydrophobiczeolite exhibited a tendency of a high increased TOC concentration.Comparative Examples 3, 4, and 5 involving too large an amount ofhydrophobic zeolite resulted in poor film formability of the outer layerfilm and the inner layer film and poor heat sealing properties and bagrupture resistance characteristics, though decrease in TOC concentrationwas large.

REFERENCE SIGNS LIST

Object 1

-   1 Content packaging bag-   2 Bag portion-   3 Content spout-   3 a Cap-   3 b Cylindrical parts-   3 c Flange-   4 Heat-sealed portion of bag portion-   A, B Cross-sectional line-   5 Upper film-   6 Lower film

Object 2

-   1 Odor-adsorbing sealant film-   2 Adhesively bonded portion between outer layer film and-   inner layer film-   3 Outer layer film-   4 Inner layer film-   5 Sealant layer-   6 Odor-adsorbing layer-   6 a Odor-adsorbing layer-   6 b Odor-adsorbing layer-   7 Non-odor-adsorbing layer-   8 Base material layer-   9 Adhesion layer-   11 Package or liquid content package for BIB-   12 Double-bag portion-   13 Content spout-   14 Heat-sealed portion of double-bag portion-   15 Upper film-   16 Lower film-   A, B Cross-sectional line

Object 3

-   1 Odor-adsorbing laminate-   2 Base material layer-   3 Adhesion layer, Adhesion layer-   3 a Odor-adsorbing adhesion layer-   3 b Non-odor-adsorbing adhesion layer-   4 Sealant layer-   4 a Odor-adsorbing sealant layer-   4 b Non-odor-adsorbing sealant layer

Objects 4 and 5

-   1 Package or liquid content package for BIB-   2 Double-bag portion-   3 Content spout-   4 Heat-sealed portion of double-bag portion-   A, B Cross-sectional line-   5 Upper film-   6 Lower film-   7 Adhesively bonded portion between outer layer film and inner layer    film-   8 Outer layer film-   9 Inner layer film-   10 Sealant layer-   11 Odor-adsorbing layer-   11 a Odor-adsorbing layer (concentration a)-   11 b Odor-adsorbing layer (concentration b)-   12 Non-odor-adsorbing layer-   13 Base material layer-   14 Adhesion layer

1. A resin composition for an odor-adsorbing molded article, comprisingat least thermoplastic resin A and an odor adsorbent material, whereinthe odor adsorbent material comprises hydrophobic zeolite having aSiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1, and a melt flow rate of thethermoplastic resin A is 5 g/min or more and 100 g/min or less.
 2. Theresin composition for an odor-adsorbing molded article according toclaim 1, wherein the odor adsorbent material further comprises achemical adsorbent-supported inorganic porous material.
 3. The resincomposition for an odor-adsorbing molded article according to claim 1,wherein the odor adsorbent material is melt-kneaded with thermoplasticresin B in advance at an odor adsorbent material/thermoplastic resin Bmass ratio of 0.5/99.5 or more and 40/60 or less, and a melt flow rateof the thermoplastic resin B is 5 g/min or more and 100 g/min or less.4. The resin composition for an odor-adsorbing molded article accordingto claim 1, wherein the thermoplastic resin A comprises a polyolefinresin.
 5. The resin composition for an odor-adsorbing molded articleaccording to claim 1, wherein a content of the odor adsorbent materialin the odor-adsorbing molded article is 0.3% by mass or more and 15% bymass or less.
 6. The resin composition for an odor-adsorbing moldedarticle according to claim 1, wherein a content of the hydrophobiczeolite in the odor-adsorbing molded article is 0.3% by mass or more and15% by mass or less.
 7. The resin composition for an odor-adsorbingmolded article according to claim 2, wherein the chemical adsorbent ofthe chemical adsorbent-supported inorganic porous material has afunctional group reactive with one or two or more members selected fromthe group consisting of an aldehyde, a ketone, and a carboxylic acid. 8.The resin composition for an odor-adsorbing molded article according toclaim 2, wherein the chemical adsorbent of the chemicaladsorbent-supported inorganic porous material has an amino group.
 9. Theresin composition for an odor-adsorbing molded article according toclaim 2, wherein a content of the chemical adsorbent of the chemicaladsorbent-supported inorganic porous material in the odor-adsorbingmolded article is 0.1% by mass or more and 10% by mass or less.
 10. Anodor-adsorbing molded article prepared from a resin composition for anodor-adsorbing molded article according to claim
 1. 11. A content spoutmolded article comprising an odor-adsorbing molded article according toclaim
 10. 12. A content spout molded article for a BIB packaging bagcomprising a content spout molded article according to claim
 11. 13. ABIB packaging bag having a content spout molded article for a BIBpackaging bag according to claim
 12. 14. An odor-adsorbing sealant filmcomprising at least an outer layer film and an inner layer film, whereinthe outer layer film and the inner layer film are adhesively bonded onlypartially to each other, each of the outer layer film and the innerlayer film comprises a sealant layer containing low elutablepolyethylene, the sealant layer of the inner layer film comprises anodor-adsorbing layer, the odor-adsorbing layer contains the low elutablepolyethylene and an odor adsorbent material, the odor adsorbent materialcomprises hydrophobic zeolite, the hydrophobic zeolite has a SiO₂/Al₂O₃molar ratio of 30/1 to 8000/1, and a content of the hydrophobic zeolitein the sealant layer is 0.1% by mass or more and 13% by mass or less.15. The odor-adsorbing sealant film according to claim 14, wherein thesealant layer of the outer layer film further comprises theodor-adsorbing layer.
 16. The odor-adsorbing sealant film according toclaim 14, wherein the odor adsorbent material further comprises achemical adsorbent-supported inorganic porous material, and a content ofthe chemical adsorbent-supported inorganic porous material in thesealant layer is 0.1% by mass or more and 10% by mass or less.
 17. Theodor-adsorbing sealant film according to claim 14, wherein a density ofthe low elutable polyethylene is 0.90 g/cm³ or larger and 0.94 g/cm³ orsmaller.
 18. The odor-adsorbing sealant film according to claim 14,wherein the low elutable polyethylene is LLDPE.
 19. The odor-adsorbingsealant film according to claim 14, wherein the low elutablepolyethylene is one or two or more members selected from the groupconsisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.
 20. The odor-adsorbingsealant film according to claim 14, wherein the low elutablepolyethylene which has the number of pinholes formed after 5000 Gelboflexes at 23° C. in a 50 μm thick film prepared from only the lowelutable polyethylene is 0 or 1 or more and 160 or less.
 21. Theodor-adsorbing sealant film according to claim 14, wherein the lowelutable polyethylene which has a concentration of elutable TOCcontained in a film prepared from only the low elutable polyethylene is1.5 ppm or higher and 250 ppm or lower.
 22. The odor-adsorbing sealantfilm according to claim 14, wherein the hydrophobic zeolite ismelt-kneaded with a thermoplastic resin in advance at a hydrophobiczeolite/thermoplastic resin mass ratio of 0.5/99.5 to 40/60.
 23. Theodor-adsorbing sealant film according to claim 16, wherein the chemicaladsorbent-supported inorganic porous material is melt-kneaded with athermoplastic resin in advance at a chemical adsorbent-supportedinorganic porous material/thermoplastic resin ratio of 0.5/99.5 to40/60.
 24. The odor-adsorbing sealant film according to claim 22,wherein a melt flow rate of the thermoplastic resin is 0.2 to 10.0 g/10min.
 25. The odor-adsorbing sealant film according to claim 16, whereinthe chemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has a functional group reactive with one ortwo or more members selected from the group consisting of an aldehyde, aketone, and a carboxylic acid.
 26. The odor-adsorbing sealant filmaccording to claim 16, wherein the chemical adsorbent constituting thechemical adsorbent-supported inorganic porous material has an aminogroup.
 27. The odor-adsorbing sealant film according to claim 14,wherein the odor-adsorbing layer comprises a non-odor-adsorbing layer onone side or both sides, and the non-odor-adsorbing layer is a layer thatcomprises low elutable polyethylene and does not comprise the odoradsorbent material.
 28. The odor-adsorbing sealant film according toclaim 14, wherein the outer layer film further comprises a base materiallayer.
 29. An odor-adsorbing packaging material comprising anodor-adsorbing sealant film according to claim
 14. 30. A liquid contentpackaging bag for BIB prepared from an odor-adsorbing packaging materialaccording to claim
 29. 31. An odor-adsorbing laminate comprising atleast a base material layer, an adhesion layer, and a sealant layer,wherein the adhesion layer and/or the sealant layer contains an odoradsorbent material, when the adhesion layer contains the odor adsorbentmaterial, a content of the odor adsorbent material in the adhesion layeris 0.3% by mass or more and 50% by mass or less, when the sealant layercontains the odor adsorbent material, a content of the odor adsorbentmaterial in the sealant layer is 0.3% by mass or more and 15% by mass orless, and the odor adsorbent material comprises hydrophobic zeolitehaving a SiO₂/Al₂O₃ molar ratio of 30/1 or more and 8000/1 or less. 32.The odor-adsorbing laminate according to claim 31, wherein the adhesionlayer is a dry lamination adhesion layer or a non-solvent laminationadhesion layer.
 33. The odor-adsorbing laminate according to claim 31,wherein the adhesion layer is an extrusion coating adhesion layer or asand lamination adhesion layer, and a content of the odor adsorbentmaterial in the adhesion layer is 0.3% by mass or more and 15% by massor less.
 34. The odor-adsorbing laminate according to claim 31, whereinthe odor adsorbent material further comprises a chemicaladsorbent-supported inorganic porous material.
 35. The odor-adsorbinglaminate according to claim 31, wherein the odor adsorbent material ismelt-kneaded with thermoplastic resin A in advance at an odor adsorbentmaterial/thermoplastic resin mass ratio of 0.5/99.5 or more and 40/60 orless.
 36. The odor-adsorbing laminate according to claim 31, wherein theadhesion layer further contains one or two or more members selected fromthe group consisting of a polyurethane resin, a polyester resin, apolyamide resin, and a polyolefin resin.
 37. The odor-adsorbing laminateaccording to claim 31, wherein the sealant layer further containsthermoplastic resin C having a melt flow rate of 0.2 g/10 min or moreand 10.0 g/10 min or less.
 38. The odor-adsorbing laminate according toclaim 31, wherein the adhesion layer comprises an odor-adsorbingadhesion layer containing the odor adsorbent material, and anon-odor-adsorbing adhesion layer containing no odor adsorbent material,and the non-odor-adsorbing adhesion layer is in contact with one side orboth sides of the odor-adsorbing adhesion layer.
 39. The odor-adsorbinglaminate according to claim 31, wherein the sealant layer comprises anodor-adsorbing sealant layer containing the odor adsorbent material, anda non-odor-adsorbing sealant layer containing no odor adsorbentmaterial, and the non-odor-adsorbing sealant layer is in contact withone side or both sides of the odor-adsorbing sealant layer.
 40. Theodor-adsorbing laminate according to claim 34, wherein a content of thehydrophobic zeolite in the adhesion layer is 0.3% by mass or more and13% by mass or less, and a content of the chemical adsorbent-supportedinorganic porous material in the adhesion layer is 0.3% by mass or moreand 10% by mass or less.
 41. The odor-adsorbing laminate according toclaim 34, wherein a content of the hydrophobic zeolite in the sealantlayer is 0.1% by mass or more and 13% by mass or less, and a content ofthe chemical adsorbent-supported inorganic porous material in thesealant layer is 0.1% by mass or more and 10% by mass or less.
 42. Theodor-adsorbing laminate according to claim 34, wherein the chemicaladsorbent of the chemical adsorbent-supported inorganic porous materialhas a functional group reactive with one or two or more members selectedfrom the group consisting of an aldehyde, a ketone, and a carboxylicacid.
 43. The odor-adsorbing laminate according to claim 42, wherein thechemical adsorbent has an amino group.
 44. An odor-adsorbing film forpackaging materials comprising an odor-adsorbing laminate according toclaim
 31. 45. An odor-adsorbing packaging material comprising anodor-adsorbing film for packaging materials according to claim
 44. 46.An odor-adsorbing packaging material comprising at least an outer layerfilm and an inner layer film, wherein the outer layer film and/or theinner layer film comprises an odor-adsorbing film for packagingmaterials according to claim 44, and the outer layer film and the innerlayer film are adhesively bonded only partially to each other.
 47. Anodor-adsorbing packaging material for BIB prepared from anodor-adsorbing packaging material according to claim
 46. 48. Anodor-adsorbing liquid content packaging material for BIB prepared froman odor-adsorbing packaging material according to claim
 46. 49. Apackage having a double-bag portion comprising at least an outer layerfilm and an inner layer film, wherein the outer layer film and the innerlayer film are adhesively bonded only partially to each other, each ofthe outer layer film and the inner layer film comprises a sealant layercontaining low elutable polyethylene, the sealant layer of the innerlayer film comprises an odor-adsorbing layer, the odor-adsorbing layercontains the low elutable polyethylene and an odor adsorbent material,the odor adsorbent material comprises hydrophobic zeolite, thehydrophobic zeolite has a SiO₂/Al₂O₃ molar ratio of 30/1 to 8000/1, anda content of the hydrophobic zeolite in the sealant layer of the innerlayer film is 0.1% by mass or more and 13% by mass or less.
 50. Thepackage according to claim 49, wherein the odor adsorbent materialfurther comprises a chemical adsorbent-supported inorganic porousmaterial, and a content of the chemical adsorbent-supported inorganicporous material in the sealant layer of the inner layer film is 0.1% bymass or more and 10% by mass or less.
 51. The package according to claim49, wherein a density of the low elutable polyethylene is 0.90 g/cm³ orlarger and 0.94 g/cm³ or smaller.
 52. The package according to claim 49,wherein the low elutable polyethylene is LLDPE.
 53. The packageaccording to claim 49, wherein the low elutable polyethylene is one ortwo or more members selected from the group consisting of C4-LLDPE,C6-LLDPE, and C8-LLDPE.
 54. The package according to claim 49, whereinthe low elutable polyethylene which has the number of pinholes formedafter 5000 Gelbo flexes at 23° C. in a 50 μm thick film prepared fromonly the low elutable polyethylene is 0 or 1 or more and 160 or less.55. The package according to claim 49, wherein the low elutablepolyethylene which has a concentration of elutable TOC contained in afilm prepared from only the low elutable polyethylene is 1.5 ppm orhigher and 250 ppm or lower.
 56. The package according to claim 49,wherein the hydrophobic zeolite is melt-kneaded with a thermoplasticresin in advance at a hydrophobic zeolite/thermoplastic resin mass ratioof 0.5/99.5 to 40/60.
 57. The package according to claim 50, wherein thechemical adsorbent-supported inorganic porous material is melt-kneadedwith a thermoplastic resin in advance at a chemical adsorbent-supportedinorganic porous material/thermoplastic resin ratio of 0.5/99.5 to40/60.
 58. The package according to claim 56, wherein a melt flow rateof the thermoplastic resin is 0.2 to 10.0 g/10 min.
 59. The packageaccording to claim 50, wherein the chemical adsorbent constituting thechemical adsorbent-supported inorganic porous material has a functionalgroup reactive with one or two or more members selected from the groupconsisting of an aldehyde, a ketone, and a carboxylic acid.
 60. Thepackage according to claim 50, wherein the chemical adsorbentconstituting the chemical adsorbent-supported inorganic porous materialhas an amino group.
 61. The package according to claim 49, wherein theinner layer film comprises a non-odor-adsorbing layer on one side orboth sides of the odor-adsorbing layer, and the non-odor-adsorbing layeris a layer that comprises low elutable polyethylene and does notcomprise the odor adsorbent material.
 62. The package according to claim49, wherein the outer layer film further comprises a base materiallayer.
 63. A liquid content package for BIB comprising a packageaccording to claim
 49. 64. A packaging material constituting a packageaccording to claim
 49. 65. A package comprising a double-bag portioncomprising at least an outer layer film and an inner layer film, and acontent spout comprising a resin molded article, wherein the outer layerfilm and the inner layer film are adhesively bonded only partially toeach other, each of the outer layer film and the inner layer filmcomprises a sealant layer, the sealant layer comprises an odor-adsorbinglayer, the odor-adsorbing layer contains low elutable polyethylene andan odor adsorbent material, the content spout contains a polyolefinresin and the odor adsorbent material, the odor adsorbent materialcomprises hydrophobic zeolite, the hydrophobic zeolite has a SiO₂/Al₂O₃molar ratio of 30/1 to 8000/1, and a content of the hydrophobic zeolitein the sealant layer is 0.1% by mass or more and 13% by mass or less.66. The package according to claim 65, wherein the odor adsorbentmaterial further comprises a chemical adsorbent-supported inorganicporous material, and a content of the chemical adsorbent-supportedinorganic porous material in the sealant layer is 0.1% by mass or moreand 10% by mass or less.
 67. The package according to claim 65, whereina content of the hydrophobic zeolite in the content spout is 0.1% bymass or more and 13% by mass or less.
 68. The package according to claim65, wherein the odor adsorbent material further comprises a chemicaladsorbent-supported inorganic porous material, and a content of thechemical adsorbent-supported inorganic porous material in the contentspout is 0.1% by mass or more and 10% by mass or less.
 69. The packageaccording to claim 65, wherein a density of the low elutablepolyethylene is 0.90 g/cm³ or larger and 0.94 g/cm³ or smaller.
 70. Thepackage according to claim 65, wherein the low elutable polyethylene isLLDPE.
 71. The package according to claim 65, wherein the low elutablepolyethylene is one or two or more members selected from the groupconsisting of C4-LLDPE, C6-LLDPE, and C8-LLDPE.
 72. The packageaccording to claim 65, wherein the low elutable polyethylene which hasthe number of pinholes formed after 5000 Gelbo flexes at 23° C. in a 50μm thick film prepared from only the low elutable polyethylene is 0 or 1or more and 160 or less.
 73. The package according to claim 65, whereinthe low elutable polyethylene which has a concentration of elutable TOCcontained in a film prepared from only the low elutable polyethylene is1.5 ppm or higher and 250 ppm or lower.
 74. The package according toclaim 65, wherein the hydrophobic zeolite is melt-kneaded with athermoplastic resin in advance at a hydrophobic zeolite/thermoplasticresin mass ratio of 0.5/99.5 to 40/60.
 75. The package according toclaim 66, wherein the chemical adsorbent-supported inorganic porousmaterial is melt-kneaded with a thermoplastic resin in advance at achemical adsorbent-supported inorganic porous material/thermoplasticresin ratio of 0.5/99.5 to 40/60.
 76. The package according to claim 65,wherein a melt flow rate of the thermoplastic resin is 0.2 to 10.0 g/10min.
 77. The package according to claim 66, wherein the chemicaladsorbent constituting the chemical adsorbent-supported inorganic porousmaterial has a functional group reactive with one or two or more membersselected from the group consisting of an aldehyde, a ketone, and acarboxylic acid.
 78. The package according to claim 66, wherein thechemical adsorbent constituting the chemical adsorbent-supportedinorganic porous material has an amino group.
 79. The package accordingto claim 65, wherein the outer layer film and/or the inner layer filmcomprises a non-odor-adsorbing layer on one side or both sides of theodor-adsorbing layer, and the non-odor-adsorbing layer is a layer thatcomprises low elutable polyethylene and does not comprise the odoradsorbent material.
 80. The package according to claim 65, wherein theouter layer film further comprises a base material layer.
 81. A liquidcontent package for BIB comprising a package according to claim
 65. 82.A packaging material constituting a package according to claim 65.